4000Q Fuel Q: FPR or fuel distributor

[SuffolkD at aol.com]

Quick Q about the two screw thingy on the front of the 4000 Q JT engine fuel 
distributor.

Family Album doesn't clearly show the exact part number
1986: MG 1 SG 33 Ill 19-00

1A Pressure regulator PN# 026 133 482
or
7A Potentiometer for ECU cars PN# 035 133 472B

Which is the the two screw thingy? facing the front of the car?

Is this NLA or does anyone have a replacement/used one?  
-Scott by BOSTON

car running rough w/ hestitation in the lower RPM and poor power.