I also routed my wiring through the aft bulkhead below the bottom rudder bolt bracket, then curved it up into the lower cap. I encased/protected the wire in clear vinyl tubing from Home Depot Aviation Supply's refrigerator icemaker tubing section.
In the links below (from my KitLog site), you see how I created the mount for the tail light.
Here's what you don't see (sorry): I connected the ship's end and light's end wires using 20-gauge 2-wire male/female connectors I bought from a local RC model aircraft store. These things are awesome: They connect firmly and are very thin, passing through the center of the light's mounting bracket hole on the bottom of the lower rudder cap. In turn, I gave myself plenty of service-loop slack in the tail, which will allow me to pull the light for future maintenance. I shrink-wrapped all of these connections for stress relief, and it just rests in the rudder bottom cap.
Sid "Scroll" Mayeux, Col, USAF (ret)
Northwest Regional, Roanoke TX (52F...home of DR's Van Cave)
"KELLI GIRL" N260KM RV-7A tipper, YIO-360M1B, dual SkyView, GTN-650, VPX, EarthX LiFePO.
Wrap by AircraftWraps.Com. Nose Art by VictoryGirl.com.
90% done, 90% to go...
Proud and grateful 2018 -=VAF=- Contributor
Last edited by scrollF4 : 02-08-2018 at 07:59 AM.