This V-Lock Battery Plate (BM812) from Blackmagic is a V-Lock compatible battery plate for attaching third party batteries to URSA cameras.

The URSA features a universal standard 4 pin broadcast power connector that is compatible with most 12V - 30V power supplies. When you’re location shooting and want to integrate a battery solution into the camera itself, then URSA includes mounting holes on the rear of the camera compatible with both V-Mount and Anton Bauer Gold Mount back plates and batteries. The power connection for these battery mounts is under the plate itself so all power connections are hidden and protected from damage.