zf6 clutch fork linkage info???

[melmount]

On the zf6 clutch fork theres 2 sides to it. Onbe side is for the hydraulic clutch. The other side rests on a part that snaps into the bell housing. What is this part. I am putting in a zf6 into a friends 99. Somehow we lost the piece that holds the fork stationary on the pass side? Its a small part but it looks like i need it. The fork pivots on this?
thx