I moved into a new home. There is a media room that was set up for 5.1. The rear L\/R speakers were gone, but the seller left the surround speaker wires. They are quite heavy duty and on the amp end they have what appears to be a termination module that says MIT44. It looks like the following:\nMy surround speakers don’t work. All other speakers do. Does anyone know what these modules are and what they’re for?