Treating cable terminations in wet environment


I am in the middle of an addition that includes a new master bathroom and I recently bought a very nice pair of wall mounted speakers made for this application.

The problem is that the skrews for the speakers are quite small and made for bare wire or very small terminations. Any suggestions on treating the contacts to avoid complications from humidity?
unclejeff
dielectric grease,available at most auto parts/hardware places.Comes in a tube.Possibly nail polish,though not positive about that.Good luck,bob
Paint completed connections with polyurethane or blob on some RTX silicone (as used in electronic applications; standard silicone attacks copper while curing.)