Hey, welcome tot he forum... nice boat
I am going to do the same thing to run the boom vang control back to the cockpit, like they do on the bigger boats. There is one spot on the cabin top alongside the Main Sheet, Outhaul & Main Halyard Spinlocks. This is probably the only location that is reinforced underneath to support the spinlock.
Melrna over at Sailnet did this a while ago, and this is how she got the headliner down and back up.
Hunter 36 Headliner