Wire tube in mast
I did it on my Newport 30 mklll..Mast 40''
On front of mast, to one side or other, drill small holes 2-3 feet apart up mast.Then put the mast with holes facing down and install lite weight maybe 3/4"-1'' pvc tubing.
Again now drill holes in the pvc thru the previous holes and rivet the pvc in(rivets are Aluminium)...Leave an opening for various things in mast on the way up so wire can be feed out to them. This came standard on the Newport and I redid it 14 years later....Sailed to Bermuda, Bahamas, East Coast offshore during those times...