I would start with the midi section of the op-z manual - https://teenage.engineering/guides/op-z/midi
Also the op-z midi thread is a good place to see what other people have done, what issues they have had and how they have solved or worked around them - Op-z MIDI Thread
I don’t know if the circuit sends midi or how that is configured, but if it can send midi messages the op-z can receive them.