Motor Power connections on the Control Hub (REV-31-1595) use the JST VH style connector. This connector is keyed and locking with a small latch, seen below, which must be depressed to release the cable.
REV Robotics recommends, in most cases, that teams use pre-made cables because crimp quality is better when made using industrial tooling. These cables can be purchased directly from the REV Robotics website or through other online vendors.
For teams that want to try crimping their own cables, or to find more information about the connectors, Table 3 lists the appropriate part numbers.
10A Continuous Current (16AWG)
Accepts 22-16AWG Wire