

I'd have to see the faces of the connectors to really get a better idea of what they are for. Do you have steering wheel controls? The white one may possibly be for that. But without seeing the number of pins in the connector, wire colors, connector layout, etc, it's just guessing.
Also, not to rain on your parade... wire nuts definitely aren't meant for the mobile environment. Since you have it all back together, I wouldn't worry TOO much about it just yet, but at your earliest opportunity, consider changing those out with crimp splices, or even solder splices. Much less chance for the wires to come out, short out, and you won't have that huge mound of wirenuts!:bravo:
Other than that, how did the phone mount attach behind the trim piece? How's the sound difference? Looks good installed.
Use the iso bracket mount instead of the din cage, it's a better install, and use the kit's trim ring, I have the same kit and you will like the finish look.
thanks for the advice. will crimp them later. no steering wheel controls. the new radio sounds much louder than the factory radio. might decide to swap out the speakers later. the phone holder I wrote up here: http://www.toyota-4runner.org/4th-gen-t4rs/177085-diy-smartphone-holder.html
There were two factory connectors that didn't have a use for the new radio. One was a plug that was next to the power plug. Not sure what it's for.
I like how you mounted your phone where it is. Quite innovative. Is it stable? or does it tend to vibrate some? Does it block the vent any? Mine is mounted over by the glove box (the phone sits just to the right of the radio), and I like it, but I have to reach over to do anything. I like your mount because it's right there in your face. You don't have to really take your eyes off the road too much to look at it. I might just have to try that...

What you have labeled as the power plug is actually the antenna. The smaller one that you didn't have use for is a secondary antenna. Some owners have purchased an adapter kit that joins the two into a single connector for aftermarket head units, but many (me included) decided to just leave the secondary antenna disconnected with no effect on reception.
FWIW, your power comes from one of the wires in the harness - it is connected to a 12v acc. power feed.
Good call on swapping out the wire nuts at some point. I would recommend you get yourself an inexpensive soldering iron,some decent solder (made for electrical work), and some heat shrink tubing.

