Two things, contrair to popular belief, you're not an idiot or we wouldn't be seeing you on this coal burning FORUM.
Secondly, life is only as complicated as we choose to make it. Son, you're not tearing anything apart, I wouldn't think, just put the tip of the 3 in 1 in the holes and give her three quick, firm squeezes--put a piece of newspaper underneath, wipe any excess that you may get, with a paper towel. You'll do fine my young friend.
PS, give the 3 in 1 can a test squeeze into that paper towel so you know how to squeeze her for them thar 3 drops each hole.