We use a "Blind Pin" detail on our Mail Slot Cabinet with 1/2" Thick Shelves.

I'm using the Fixed Shelves EQ Subassembly in a Tall Open Product.

I changed the shelf material to 1/2" thick and the Construction Holes to 5mm. But they are not centered on the shelves anymore and I cannnot find out where to make that adjustment at. 

Does anyone know where I need to go to make that 1/8" adjustment?