Need help identifying ESB Star Destroyer Greeblie

Hello all. Great to be a part of the group.

I'm building Randy Cooper's 42" Avenger, and am detailing the rear outboard and inboard baffle actuators, attempting to replicate and rescale the 8' studio model parts. I have had some great help in identifying about all of the parts needed, but there is a mystery greeblie directly forward of the outboard turrets that as yet I have not been able to identify.

Any help would be greatly appreciated!