Maybe yes.  Just to be very clear you would not disconnect the ribbon cable on the hashboard end, you would disconnect it on the controller board end and then plug it in to the open port on the controller board.  And yes the right side board as viewed from the front.

EDIT: I'm sure you probably understood me correctly I just don't want to be responsible for giving advice that causes someone to do something crazy like running a control ribbon between two ports on the control board and frying a very expensive miner.