I’m still having trouble

I'm still having trouble understanding your situation. Are you saying that you have ONLY ONE XLR connector on your camcorder? . . .  what the heck camcorder is THIS? . . .  or are you saying that your camcorder has only one XLR connector that is working, implying that the camera has two external mic connectors, but only one works??

Whatever, if you want to use two or more mics into ONE connector, you'll need  MIXER. A splitter would be inadvisable or inoperative.

Rick Crampton