MIDI Control Boss RC-50 with BeatStep

I have a Boss RC-50 Loop Station and I want to set up my BeatStep to MIDI control some of the functions on the RC-50. The RC-50 allows CC# 1, 7, and 80 but there are many different fucntions one can control. I don’t see how in the MIDI Control Center to point the knobs and pads to the correct functions on the RC-50.