I made a charge cord with standard female battery connector on one end and a Futaba J connector on the other end. The standard battery connector plugs into the MRC charger and the Futaba J connector plugs into a charge port lead coming off my battery switch. I used 6 feet of 16GA patch cord in between the two connectors. Everything is soldered and sealed neatly with heatshrink. When charging my R/Cs in the field from my car battery I keep the charger under my hood and the R/Cs on the floor under my car. I charge the hump @ .5A, 30mv Delta Peak.
Your LHS should have the connectors. They look like this: