#2 is the safest.1. Connect the power wire to the blanks in the fuse box using spade terminals
2. Connect the power wire directly to the battery's positive terminal
3. Splice the power wire in with the power wire behind the cigarette lighter
Edit: I read this a bit wrong. I took it for granted that the M1-ATX would be used to power everything. Thus, when I posted I meant it's safest to run power wire directly from the battery's positive terminal to the M1-ATX, then use the M1-ATX to power the cpu and screen. Sorry I didn't clarify before.
Yes and YesAlso, is the power wire just regular 12V Primary Wire and do the ignition wires just need to be connected to any wire that receives power when the car is either on or in accessory mode?