i'm pretty sure the K3 coils are the same as the K6 coils, and the spark plug wires go straight into the coils, they dont cap onto a stem like most of them do,
http://www.sohc4.us/forums/index.php?topic=1580.0serveral good ideas found there
for your particular problem the cheapest fix would be to use the nail trick (use a conductive nail and jab it into both ends making contact with the wires inside) then put some heatshrink tubing on it, that would take care of your "rain problem" there
or the NKG splicers work well too but they are around $8 or at least i think they were