I am convinced that the deck connections all rot! I have to hit them with sand cloth every use to get them to work. They leak and the caps last about a week. I have also had them shear off when moving my dingy around the fordeck. I am going to put a connection like a trailer connection in it's place. Two, both steaming and anchor lights or a four pole trailer connector. I purchased a small deck gland for my VHF deck penetration that works great. I will used the same gland fitting for the light cable deck penetration. No more wiggling and swearing. The last thing you need when setting the anchor on a dark and windy night is to have to mess with the light.
Ken B
CMDRE - NE Trailer Sailors