We have some information of the item(PLATE/DWG No,SB-0063A) ordered in PO#81406008.
This plate is installed in some parts such as a stock bin and an impeller.
In order to replace the plate, you need to take these parts apart and It will take a lot of time.
This plate is also put together on another plate with many bolts.
When you install this new plate(SB-0063A), you need to make holes on this plate adjusting to the existing holes on the other plate.
Please see the attached photos for your reference.
Is that make sense to you?