How to change play/start action in MainStage 3 from space bar to return bar

Hi! MainStage 3 key commands issue:

I'm a drummer and uses MainStage 3 for backing tracks during live shows.

I don't want to have my MacBook Pro too visible and near my drum kit so

there for I'm planing to use a small wireless bluetooh numpad mounted under my hi hat

to control each patch in concert mode. The actions I need is Previous / Next and Play/Stop.

Previous/Next works perfect with the num pads arrows but a num pad doesn't have a space bar

wich is the default Play/Stop button in MainStage. Therefore I need to change the Play/Stop action

to the Return button on my num pad but I can't find any solution to do that in MainStage 3 so please

help me any kind soul out there 🙂

Thanks in advance for any help and support to solve this, cheers Peter the drummer