Charge bock for the 3 x XT battery connections. This eliminates 3-5 charge cables from your charger easily allowing you to connect an XT30, XT60, XT90, JST or JST-SH Servo Plug and Multiplex Plug. You will need to solder up some plugs and connect a positive and negative lead to your charger. Plugs were glued into the block one the short leads were soldered to the plugs. A 4.5mm hole was drilled thru the XT90 terminals for the connecting cable (See picture). you will need to take a bit of time and care with the soldering. "NEVER connect more than one battery to the charge block at the same time."