Securing/Clamping Anhor Light Wire at Top of Mast

[upstateny]

I need some ideas on how best to clamp and secure the anchor light wire at the top of the mast. My mast is 41 feet I have the 16awg anchor wire at the top of the mast. I have bolted down the anchor light. So what is the best way to clamp off the wire at the top of the mast from keeping it falling down the mast?

Yes the mast is currently off the boat. No climbing required.

[C420sailor]

After sending the wire through the bottom of the housing, I installed a large zip tie tightly around the jacket to act as a mechanical stop, and applied silicone sealant to seal the wire in the hole nicely...and also provide additional support for the wire.

It also helps that I run the wiring through a PVC conduit in the mast, so that helps keep everything in place.