Wildcat Mk3 BT regulator question

I've read the owner's manual, searched here at Airgun Nation as well as YouTube; but cannot find where the adjustment for the first regulator on a Wildcat Mk3 BT is located. The FX parts diagrams do not include the Wildcat Mk3 BT. The owner's manual shows a Maverick not a Wildcat. Is the adjustment under the stock? Is it the small black Allen screw on the left side of the action opposite the brass second regulator adjuster?
Thanks for any help to locate this elusive adjuster.

George