[tim]

Roger, I used a gel-cell type battery to keep any fumes from venting into the trunk and possibly hurting other electronics I have mounted back there. I actually use 1/0 welding lead cable from a local welding supply shop. Like Lewis my ground goes to the frame at the roll bar mount in the trunk. I ran the positive cable through a master disconect switch in the trunk through the trunk floor and along the inside of the passenger side frame rail. I mounted the cable to the frame with adel clamps which are rubber cushion type clamps to you. I have an airplane supply store local that sell these type of clamps really reasonably priced and unlike the automotive market I can get them in 1/32" incraments. So all the adel clamps I use fit really tight so there is no moving around. My selenoid is mounted on the fire wall above the foot box but over towards the engine so the cable comes up from the frame behind the headers and mounts with adel clamps to the inside of the transmission tunnel. I crimped all the cable ends on the cables with a crimping tool and sealed them with heat shrink tubing. (soldering tends to atract moisture and cause corosion). If your EM frame is newer there should be a 3/8-16 threaded bung welded in the passenger side motor mount this is to pick up your ground in the engine compartment. Run a battery cable from the frame to the motor and an 8 or 10 gage from the frame to the grounds in you engine compartment. I hope this helps.
Tim