I had it wired up this way already but couldn't get it to work. The trigger goes from the battery directly to the A5 connector behind the headlight. Starter gets 12v from the battery directly already. Issue was the battery is dead, ugh. Read 12volts when i checked it but when I put the charger on it it said it was at 9%. I just drove and had the car running 2 days ago so not sure what happened. My fault for assuming. I even did bench tests with another starter and tranny harness and it worked fine so I was confused. I should be good now.