Just received the Pro-Filter pcb, but the Wiring Diagram shows a completely different board from the one I received (no opamps). The diagram shows a 3PDT footswitch wired to bypass the board which is not shown on the schematic.
The Wiring Diagram just uses any old generic board. This is how you would wire up any PedalPCB board in True Bypass. Offboard wiring isn't shown on schematics.
Follow the wiring with your board and you will be fine.
Believe me, we all had that same question in our minds at one time or another. In my mind, it would be better if the only visible features on the "generic board" were the external connections.