Help - Korg SR 120 no sound with Cubase AI

I have connected a KORG SR-120 analog drum machine via jack from its OUTPUT to a jack INPUT 1 on the UR44. In the sound preferences I can see the beats pulsating but I cannot get any sound out of my computer speakers. I have read, watched tutorials and cannot find a solution.

Please help.

I can listen to the unit through headphones attached to the UR44 when monitoring is on in Cubase but I can’t get the sound to go through my MacBook Pro.