jwfirebird - thank you for all your help. Following your direction I was able to successfully convert a power outlet from unswitched to switched.
I installed an accessory 12v relay inbetween the + and - terminals of the power outlet fuse I wished to change. I was able to find an open ignition outlet in the MBEC panel under the steering column.
I now have successfully installed an inverter to power my Apple TV (Gen 1) that turns off with the car to play through the OEM stereo and TVs.
My next projects include installing a GM2 LockPick (GM2 LOCKPICK
) so that the front screen can view movies while the car is in motion and convert the Apple TV hard drive to SSD so it won't fail during bumpy car rides.
Thanks all for your help.