Male MC4 Locking Connector for USE-2 Wire, PV-KST4/6I-UR, 25 pack The connector can be assembled quickly on site by a contractor allowing assembly of custom cables at the job site. A special crimping tool and wrench set are required to assemble the connector. We have connectors for 10 AWG USE-2 wire and for larger diameter 10AWG PV wire. Sold in Packs of 25 connectors. Male or Female? At first glance, the distinction between male and female connectors is somewhat counter-intuitive. "Male" or "female" refers to the metal pins inside rather than the actual housing of the connectors. The housing of the male connector has a large opening at the end with the actual pin inside. The connector of the female, however, has a long tip goes fits into male connector when the two are mated. If you have any questions before you make a purchase, give us a call so we can help you understand the difference between the two!