American Autowire - not the painless- but similar idea. I did the passenger kick panel- makes for easy access in both the wiring process and any issues later on. Only down fall is it is a bit noticeable. I did it on passenger firewall on my 510 and it’s a bit more tucked in there. Note- it am not running a heater core or blower in either car which helps a little bit. Only real downfall of the passenger kickpanel is that the Z has a lot of wires in and out of the steering column and a few of the included wires from American Autowire were not long enough.
Z
510- don’t mind the mess… it was my first real wiring project… I want to go back in and clean it up one of these day…
