Hosa GXR-135 Male XLR to RCA Adapter - B-Stock
XLR PIN-2 goes to the center contact of the RCA, this carries the signal. XLR PIN-1 and 3 are tied together and carry the ground via the chassis. This connects to the surround of the RCA.
XLR PIN-2 goes to the center contact of the RCA, this carries the signal. XLR PIN-1 and 3 are tied together and carry the ground via the chassis. This connects to the surround of the RCA.