They say there is no stupid question so here goes. I am attaching the top of a display cabinet to the bottom section. I have four threaded inserts that I have placed in the bottom of the top section aligned over four holes that were drilled into the top of the bottom cabinet. This is a woodsmith pattern. I have four screws that I will screw in from the underside of the bottom cabinet. These plans are so detailed I question why they don't show the screws going into the cabinet and they don't bring it out in the instructions. It is so obvious I guess, they felt it didn't need to be said. They also didn't say not to drill all the way through the bottom section of the top cabinet so I have four holes to plug, so everything isn't obvious. Thanks for the help. Lorraine