I would leave the cover on anywhere you canas the UV at the top of the mast is murder on insulation. My wires go up a pvc pipe that is riveted to the inside of the mast. They barely fit thru so support was never an issue. Just putting in the drip loop and attaching to the mast will provide some support. Give this board a day or so and you will get a better anser than mine as this board has a lot of very knowledgable people eager to contribute. I ran a separate set of 3 wires that came out at the spreader and a 4 wire set that came out at the masthead.