Had the same problems years ago. The masts do not appear to have an ‘inbuilt’ weep hole, relying on seepage from the mast base. However, the latter tends to clogg up with dirt and with heavy downpours the water inside the mast builds up to above the rim of the raised inlet for the wiring(see Paulj’s picture in previous post) to then run the into bilge below. The idea would be to drill a small hole just above the base plate for the mast (maybe Paulj remembers thickness – otherwise do it when raising mast next). Mine is about ¼ “.
Having dreadful weather at the moment and can unfortunately therefore not send a picture until late next week.