controlling external sequencer

hello, im trying to figure out how to control an external beat machine, just want to set a loop in cubase and hit play and have the beatmachine start at the same time, ive done it before but forgot how to?

Transport menu -> Project Synchronization Setup
Cubase Operation Manual, from page 496

I’d say the particular sections you want are
Machine Control Output Destination and MIDI Clock Destinations

thank you, in a mama fratelli voice