My 97 XP is leaking through the transom penetration for the speedometer wire. Is it best to replace the "nut seal" or just use some silicone? I assume the nut seal is an o-ring or a cone washer that seals when the nut is tightened. Where is the connection to part the speedo wire to replace said nut seal? As these skis age, all kinds of little things start showing up, LOL.