Neutrik‘s 3-Pole XLR Male to RCA Male Adapter is a pre-wired connection point allowing you to conjoin heretofore incompatible items. In this case, you’re given a rugged, die-cast shell which facilitates XLR male to RCA male connections.
Wired according to IEC 268-12:
Pin 2: signal
Pin 1 and 3: connected to ground