19mm Standard charge port used in Flowglider based VEXR Builds. 4 pin XLR to keep stock XR chargers from plugging in. Has 2 xt30 outputs, 1 male to go to charge port protection diode, and 1 female xt30 to go to the charge xt30 on the 16 pin harness connector. Pin 1 is negative, pin 2 is positive. If you do not want to use a charge diode, you can use a shorted xt30 male plug to bypass it.