Yes that is the Deans Ultra plug female and all my chargers and patch chords use the male Deans Ultra plug.

Some of those Starters I originally set up the plugs so that you unplugged the deans from the battery to the motor to plug up the charger. My latest ones I am leaving the motor hot all the time and the female Ultra plug for charging is just paralelled into this line.

If at some point the switch fails with a welded set of contacts and the motor won,t stop then just just a tug on the blade connectors at the battery will shut things down.

John