420A 420a mega/microsquirt fuel only wiring

[stamper91]

I've hunted over 3 hrs for information on this forum before a wisea$$ tells me to use the search function.

I'd like a fuel only wiring diagram for mega/microsquirt, such as what all needs tied into or replaced etc.
According to chatgpt it says just need to cut the injector grounds and run those to the ms, leave the rest alone and obviously power and grounds for the ms (which I believe is total BS).

 

[VelocitàPaola]

https://www.symtechlabs.com/docs/ms_wiring_guide-420A-2_0.png

It'll also need signals from the engine sensors.