Good question. Actually, this will probably do not much at all. PC messages allow pattern selection on all Elektrons. But this PC section was copied from a different synth definition, I guess. To select pattern B01, you need to have this line in your PC section:
17 B01
Or use this section I’ve posted in the Octatrack definition topic for a list of all patterns:
Instrument definition:Elektron Octatrack: