So, if you already own a balanced phono stage, you would remove the RCA plugs from your phono cables. Then solder the bare lead that was connected to the center plug of the RCE to pin2 of an XLR. The bare lead that was connected to the outer barrel or ground of the RCA would connect to pin3 of the XLR. If the RCA cable has a shield, connect the shield to pin1. It is best if your RCA uses separate conductors for hot and ground where ground is distinct from the shield. This scenario holds where the cable runs direct from the cartridge pins or from a DIN plug or from an outboard box.
What rdk77 shows may be true for the turntables mentioned but gives the false impression that you need to buy a “balanced turntable” to operate in balanced mode. That’s total BS.