Hi Mike. Theres two important rules to remember when using a butt and scribe jig. No 1, always cut left to right. No 2, always cut into the post formed worktop edge. So if your female cut is on the right as you look at it, the worktop will be laminate side up. If the joint is on the left, it will be lamimate side down. Remember these two rules, you won't go wrong. Good luck