A little help. I've never played this but me and my son want to give it a try.

Im building my son a sim rig for his Xbox Series S using a G920. I want him to have use of hand-break as well but Im not trying to pay over $120 for one. Im making a makeshift one that'll activate button on controller. My question is Can one of the triggers be used as hand-break button? Or would that affect the pedal use in any way?