Like in the wings and RF I installed conduits in the arc, these are for the interior lights and GPS antenna.
I drilled some holes for grommets and for the termination adapter of the conduit:
Next I designed and created brackets where the conduits ends:
Bracket installed, re-using existing rivet holes:
I installed the conduits with help of some soundproofing material:
Joining angles riveted in place:
Detail of clearance hole: