Hello all, I have installed a grubee 66/80 kit and the furnished plug wire AND spare appear to NOT lock on the plug, just held close by the rubber boot?? Is this right?? Also, kit came with 2 plugs, one regular and one with 3 ground electrodes- which to use when and why?? I recieved no real instructions and not even a complete "parts included" list! Any help appreciated, Thanks, Felixsail