there be no way to mark the correct position of both piece so they would fit together properly . after ruin one piece by put it in the wrong position , we put mask tape on the back of it to line it up with the second piece . that work as a trial -lrb- and something we should have do first -rrb- but when both latch and catch be properly line up , the door would not unlock , as the cabinet door be evidently too thick , although the writeup say the lock would work on door up to one inch ... we give up , think about screw they on , but decide it be not worth the trouble . if you want to use the magnetic lock , be sure you cabinet door be less than one inch thick . a waste of money on we part . tome