If it is SPDIF output it includes both channels. It sounds as though your outputs are analog and will not work with the speakers.

The manual is very clear about how to type the speakers and set one as Master (Controller in your case) and Slave. You must have them connected with a COMMS cable.

1: 808.6 Anniversary, 504, Sony ES Bluray player, Apple TV, Trinnov Altitude 32, 7200SEU l/r/c, plus for immersive audio
2: Theta Compli Blu, Apple TV, HD621, G61RSL, B&W Sig 8NT l/r/c, & Runco Plasma
3: 861v8, 504, Apple TV for streaming 3100 l/r/c
roon all around