Yeah basically if you don't have an aftermarket deck you'll want to use an accessory/ignition wire for the remote wire. Just don't use a constant wire. That equals dead battery.
you can use the red wire off the brake switch with a relay. honestly id use a relay for amp turnon off the ign harness also. while fusing the 86 for no more then 5amps. but thats me.
Hmm.. how did it come out? Bose systems are pretty shitty when it comes to aftermarket integration. I'm guessing you used a line drop? How well did it convert the signal? Not sure how the brand new Bose systems work, but if you tried to do this on a car that was about 2005 or so you'd get a ****ed up system.