This SAE version of the fused eyelet lead is the same as those supplied with all current OptiMate chargers. It has a rubber cover for the 2-pin connector to keep the electrical connects dry and corrosion free.
You can use additional leads to fit one to every vehicle which requires its battery to be charged - in this way one OptiMate can be used with several vehicles on a rotational basis very simply and quickly.
Simply connect the 2 ring terminals to your battery and the 2-pin connector will always be available to connect your OptiMate to without having to delve into the vehicle.