Got around to installing my Skybreaker the other day. I decided to use the factory phone plug for switched power and it was easy to locate and connect.
This small piece of carpet under the dash slides toward the frunk and exposes the forward console area.
The four wires are Brown- (ground), Yellow- (mutes radio if phone in use), Green- (switched power, 12v when key is turned to accessory), Red- (continuous 12v, not switched).
Spliced into ground (brown) and switched (green) wires and soldered. Apologies for focus and soldering abilities.
The rest was running wires as others have done. Thanks to BruceH for the velcro mounting idea.
I'll post a night pic when I get a chance.