First off, I found a way to modify the Ai-net aux switcher to work - no more butchering required!

Now I just need to route my RCA cables, what's the easiest way? I have JITS so I can find instructions on how to remove various components.

Follow the same route to the console on the right side of the car as the hydraulic hoses that go between the pump in the trunk and the top latch over the windshield.

Once you lift out the carpet from the convertible stowage tray behind the rear seats, and remove the RH speaker trim and rear seat, it should be pretty clear.