Top_Rear_Panel Model Tweak needed?

Printed the TOP_REAR_PANEL last night after adding a PTFE tube feed through slot for an eventual cable chain mod. But it sits higher on the actual unit by about 1-2mm than is shown. The piece is the same as the armor modplate, and so I looked at the instructions.

It shows pressing tabs down into slots, but the two rounded tabs are the same height as the spacers not shown in the first graphic, so they will never go down into the semi-circle tabs. The square tab circled looks to be designed to ride on top of the frame, as it is the same height as the quasi-trapezoid on the end.