If I understand your latch set up what I would do is screw one portion to the door and use double back tape on the cabinet side off the latch. Trim the tape and outline the holes on the tape to be used as a template to drill later. Prior to applying the tape to the backside of the latch rub a small amount of cream or oil on your finger and rub on latch when you close the door tightly the tape will stick to the cabinet and come off the latch allowing you to drill your 2 attach holes through the tape within 1/32 on an inch.