I have the remote display and main unit.

The wires use to connect the two are the same telephone wire with the same RJ 11 jack (RJ 11 I think it is called as opposed to RJ 45 for ethernet).

The four conductors are needed since two send power and two send digital info back and forth.

You can fish the wire up to the corned of the dashboard from the fuse panel access and then the wire also fits into the headliner without a problem.

Where you find a problem is in the a piller cover which is very tight to the window, so by removing the insulation from this section of the wire, not all of it, you can push those four wires into this tight space easily, one after the other.

Removing the A Piller can be a pain in the anal location.....

Neat is important, I agree and I hide all the wires as best as is possible too.

Too bad the remote display is not a lower profile