When I had mine I used it together with a lintronic code converter. In this way I could have three sources instead of a Beomaster. I think at the side there is an IR sensor, or you plug one in and programme the source that way. In my case I had Radio, CD and A.Tape but you could have any Audio Source or for that matter Video Source.

The external IR eye is used when you have it connected to a standalone system such as a Beosound with an Aux port, or you only require control of those additional sources in the room you are in. Which as you are using it with analogue sources is fine as you probably start them off in the room with the beomaster in.

I seem to recall I wired it into the lintronic converter which in its turn was wired into a Beolink Converter and became a fake Beomaster.

It worked really well but I replaced it with a Media Streamer controlled by the lintronic box, the media streamer has an analogue input so I use that for my turntable.