I this is my first season with my 82 cp-19 Mk2. My rule this year was not to drill any holes in the boat. (I did drill into the tiller for a tiller clutch).
There were 2 pre-drilled holes in theater tabernacle aft. I put a harken single block with cam here. The one I had from previous boat had a becket, and I attached shock chord and tied that to halyard cleat. This holds it up well, but the shock cord makes it hard to engage the cam, so I will change to 1/8 line soon.
I may need to step into the companion way to engage the cleat, but I a not climbing out of cockpit.
When not in use, the Halyard is either run on cabin top to cockpit, or most times, draped into cabin.
My boat had a lot of customizing by previous owner, so I am not sure the mast tabernacle holes are standard.