This pair of two branch connectors includes two connector styles: female and female to male, and male and male to female. Twin female or male MC4 connectors are found at the split ends of the Y connector while their opposite sex is at the other, single end of the cable.
MC4 connectors are commonly used by solar panels to connect to junction boxes, power management, or wiring between panels.
The rigid plastic of the Y-connector is ideal for making steady connections with less cabling to damage. Damaged cabling in a split connection could cause potential damage to sensitive electrical equipment when specific power requirements are necessary.