This is a XT90 Parallel Connector with 2 Male and 1 Female, which has no cable. If the power cable of your drone is long enough, you can use this no cable connector, it might save your few grams of weight. This connector is usually used for multirotors for increasing flight time. It is capable of turning 2 X 11.1V 2200mah Battery Pack (3S) into 1 X 11.1V 4400mah Battery Pack (3S).
1 x XT90 Parallel Connector