Singleplayer Configs: ARK\ShooterGame\Saved\Config\WindowsNoEditor\GameUserSettings.ini
Server Configs: GameUserSettings.ini (Hopefully your host is clear about how/where to edit this)

Add the following to the bottom of the file and edit to desired values.

[MortalWounds]
HealingEnabled=True
DisableDinos=False
MortalWoundTime=30.0
LuckyHealPercent=0.05
MortalWoundCooldown=300
MortalWoundPercentChance=0.35
FailedHealingKills=False
MortalWoundInvulTimeSeconds=0.2

MinorSuccessChance=0.25
MinorHealPercent=0.25
MinorHealTime=20.0

ModerateSuccessChance=0.5
ModerateHealPercent=0.5
ModerateHealTime=15.0

MajorSuccessChance=1.0
MajorHealPercent=1.0
MajorHealTime=5.0

MinorCraftingLevel=10
ModerateCraftingLevel=50
MajorCraftingLevel=85

PercentChanceWoundPerFortitude=0.01
DinoPercentChanceWoundPerStamina=0.01

BlacklistedDinos=

UseProximityRevivalMode=False

HardcoreMode=False
HardcoreModeMaxHealthLossPerDeath=40

DisableSelfRevival=false

HealingEnabled: After successfully being revived, the victim will heal a certain amount over a certain period of time. The amount of healing and the duration are dictated by the item used to revive the victim.

DisableDinos: Tamed dinos will no longer receive mortal wounds. As such, any damage that would normally kill them will kill them. Wild dinos can NEVER get mortal wounds.

MortalWoundTime: The time the victim remains incapacitated. This scales on dinos based on drag weight. The bigger they are, the longer they can remain wounded.

LuckyHealPercent: The percent chance that the victim to recover all by themselves, with no medical intervention.

MortalWoundCooldown: Time in between mortal wounds. When on cooldown, damage will once again kill you.

MortalWoundPercentChance: The percent chance that you will receive a mortal wound instead of dying.

FailedHealingKills: If true, when attempting to revive something, if it failed, they die. Default: False.

MortalWoundInvulTimeSeconds: The time in seconds immediately after getting wounded to remain immune to damage. Default: 0.2

SuccessChance: The percent chance this medical item will revive the victim. Acceptable values are: 0.0 through 1.0
HealPercent: The percent of total health to recover after a successful revival. Acceptable values are: 0.0 through 1.0
HealTime: The amount of time in seconds the healing will occur over.

MinorCraftingLevel: Level required to craft the Minor Healing Agent. Default: 10
ModerateCraftingLevel: Level required to craft the Moderate Healing Agent. Default: 50
MajorCraftingLevel: Level required to craft the Major Healing Agent. Default: 85

PercentChanceWoundPerFortitude: This is for a bonus roll, assuming MortalWoundPercentChance roll fails. This is a percent chance * amount of points the player has in fortitude.
- If you use 0.02 as the value and have 10 points into fortitude, you will have a 20% chance for a bonus roll at receiving a wound.
- Use a value of -1 to disable this feature.

DinoPercentChanceWoundPerStamina: This is for a bonus roll, assuming MortalWoundPercentChance roll fails. This is a percent chance * amount of points the dino has in stamina.
- If you use 0.02 as the value and the dino has 10 points into stamina, the dino will have a 20% chance for a bonus roll at receiving a wound.
- Use a value of -1 to disable this feature.

BlacklistedDinos: A comma delimited list of dino classes to NOT allow wounds on.
- Example: /Game/PrimalEarth/Dinos/Dodo/Dodo_Character_BP.Dodo_Character_BP,/Game/PrimalEarth/Dinos/Dodo/Dodo_Character_BP_Aberrant.Dodo_Character_BP_Aberrant

UseProximityRevivalMode: If true, when reviving a wounded dino/player, you will be allowed to move around and interact with the world, within a certain radius(relative to wounded character size). Leaving the radius aborts the revival process. Defaults: false

HardcoreMode: If true, players lose max potential HP each time they die. Default: False
HardcoreModeMaxHealthLossPerDeath: Amount of health lost, if hardcore mode enabled.

DisableSelfRevival: If true, a downed player can not revive themself. Default: False