I am surprised no one has responded to your question. I have built two Model IVs and helped with the finish of a Series V. The former had no center console and the V did. This is what I have found. The console can get a bit crowded especially at the aft end where everything including the control tubing for the aileron and flap functions of the flaperons, and fuel line. With the V it was a challenge as forward of the bulkhead the only structure available to secure things to is the inner wall of the console and access is very poor.
The wiring that needs to go aft of the foot well includes aft position lights, strobe, fuel pump if used and antenna wires. Also wiring for wing tip lights and wing tip strobes. Then if you will mount radio jacks near the hat rack, those too. and maybe other things that don't come up in my memory. I ran all those wires on both models.
A suggestion: run the fuel lines through the console - no brainer on the newer models as that is where the fuel valve is. Then, I would run all wiring to the side of the panel and down the door posts (both sides as appropriate), then under the door to behind the seat where they could be run in any direction as needed as the fuselage tubing tends to flair from there. I also ran the antenna cables that way, but separated them from the bundles under the door (bundles near the door post and cables near the fuselage bottom). This way, chafing can be managed and interference with the flaperon controls will be a non issue. To secure the bundles running down the door post and to add a cosmetic touch, I took some eighth inch rod and bent it into a long U and threaded the ends (6-32, I believe. These were glued to the door post with Hysol with the threaded ends extendng out. An aluminum piece was formed in sort of a long Lazy U shape with holes drilled to accept the protruding threaded rod and secured with #6 nuts. The bundles are pretty much covered by the painted aluminum covers. If you are putting in kick panels - much easier. I used lacing tape to secure the wiring aft of the seat as it can be threaded under the fabric with minimal affect on the finished fabric surface.
Other opinions may vary.
Lowell