Lowrance fish finder wires waterproof?

[Fishin' Magician]

After I'm done fishing, I try to remember to put the little rubber covers over the plugs before I wash it down. Sometimes I forget to do that, but so far have not had any problems (knock on wood). But after I've done all of my clean up, I take the covers off and then spray WD 40 on them before putting the covers back on. I do that to the FF as well. I also have some dielectric grease that I've put on there, so between the two, I think that it prevents corrosion pretty well from the salt water.