For a better idea than the hairball of wires wrapped in tape I used some of this electrical cable.
I'm a distributor for this equipment.
The cable comes with up to 12 wires in a flat cable or up to 36 wires in a round cable.
It's double insulated and it's pretty cheap also.
8 conductor cable is $ 1.25/ft.
I throw away anything less than 20' lengths.
We have it on 500' spools.
If you were closer I'd give you a left over length.
On my boat I used a piece of 8 conductor flat cable. The wires come all numbered and color coded.
Mark