i think this should be set to always spawn on the face with the timer, since it has rules related to timer

In case D, press the button when the number of solved modules is a multiple of 5 (or it is the final module).
In case E, press the button when the number of unsolved modules is a multiple of 5 (or it is the final module).

Wow, who knew a simple button could be so complex?

(comment 3/3)

Each case requires its own reaction.

In case A, press the button when the last digit of the timer is equal to the digital root of all digits in the serial number. (Add the digits together, if more than one digit, repeat with the new number. For example, to get the digital root of 347, do 3+4+7=14, then do 1+4=5, so the digital root of 347 is 5.)
In case B, press the button when the seconds digits on the timer are equal to the amount of unsolved modules. (If 60 or more, subtract 20 until between 1 and 59.)
In case C, press the button when the last two digits on the timer add to a prime number. (Prime numbers are numbers that can only be divided by one or itself to get a whole number(number that is not a decimal).)

(comment 2/3)

I wasn't able to access the manual, so I opened up the GitHub repository and read the HTML.

The power button can be in an on or off state.
The only difference will be the outer ring light, being lit or unlit respectively.
If it is on, see "Turn it off"
Otherwise, see "Turn it on"

Turn it off:
To turn off the power button, you will have one of three cases, labelled A, B, and C.

Case A: There is more than two batteries and at least one lit indicator on the bomb.
Case B: There is a lit indicator with the label CAR and an RJ-45 port on the bomb.
Case C : Neither case A, nor case B are true.

Turn it on:
To turn on the power button, you will have one of two cases, labelled D and E.

Case D: There is more than half of the original time still left on the timer.
Case E: Case D is not true.

(comment 1/2)