This image shows our recommendation for GRP camera layout installation. As you can see the pink highlight labelled V is used to identify our Verif-Eye cameras installed. For Grapple/Knuckle Boom, 2 cameras installed for Verif_Eye and are both labelled Positive Service Verification (PSV).

PSV Camera: The Positive Service Verification camera is installed on both sides to capture the knuckle when it performs services on both sides.