Barry,
thanks.
The 'big dogs' are much easier to add 'stuff' and without adding excessive weight.
===============

Nav lights (cont)
With the nav lights in the wings tips and routed to the inside edge of each outer wing: we need to make up the rest of the electrical system. I made a very large Y (green/black wires) extension with the two top ends of the Y going to each end of the center wing and the bottom end of the Y going to the fuse. There's two female plugs at the top end and a male connection at the bottom end of the Y.
A 2' extension (red/black wires) connects the center wing to the battery case in the fuse.

pic 1:
The two sets of extensions to get 'juice' from the battery case to the nav lights.

pic 2:
nav light battery case screwed to the receiver tray: One wire is routed to the on/off switch on the service panel.
(still got to organize that rats nest!)