The BMCC power supply cable
With the D-tap connector, it can be attached to the battery and battery plate easily
Since the BMCC supports wild range input voltage power supply(12V to 30V) so it can be powered either from battery or the battery plate.
The below is the link of lanparte V mount battery and V mount battery pinch.
If you have any question, Please click this link : http://www.lanparte.com/html/221.html, it will show you how to charge for BMCC detailedly.