I saw lots were confused, so wanted to put the exact steps here...

- Go here to the Warehouse Garage Expansion page ... https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=3047570167
- Subscribe to the expansion by clicking 'Subscribe' (Steam then puts the mod in place, just like when you download a car mod)
- Go here to get to the main QoLmod page ... https://www.nexusmods.com/carmechanicsimulator2021/mods/105?tab=files
- On the main page for the QoLmod, scroll down to the "Optional Files" section, and do the manual download for "ExtraCarLoaderPlaces"
- Open the zip file that you just downloaded (it is usually in your computers usual downloads folder)
- In that zip is a file called "ExtraCarLoaderPlaces.cfg" (it's the only file in the zip). Right-click on that and choose 'Copy'
- Go to the mods folder where CMS2021 is ... for me, this is at
steamapps\common\Car Mechanic Simulator 2021\Mods\QoLmod
You'll know you're in the right place if you see "QoLmod.cfg" file, and lots of other files and folders.
- Rename the existing ExtraCarLoaderPlaces.cfg file to ExtraCarLoaderPlaces.old
- Paste in the file you copied from the zip file
- In that same folder, edit the QoLmod.cfg file using Notepad
- change the AmountExtraCarsEnabled value to be 135 ... so it should look like this
AmountExtraCarsEnabled = 135
- Save the cfg file then close out Notepad
- Start the game

The warehouse is across the street. You can walk there.
- Before you can move cars there, you need to have enough alleys. The warehouse spots will start to appear in the 4th alley and on.
- To move a car to the warehouse, first move it to Parking (if it isn't already there) then swap it's current location with the location you want in the warehouse.

Hope this helps!