What am i missing here?

i just picked up my 340 and 4 speed setup, and i am wondering if i am missing something that mounts to the frame, where the z-bar ball/stud mounts? here is the pic of the z bar and ball i got with the trans. is there another plate that is welded to the frame? do i need it? also, is there a spot on the car that shows where this would fit? like how they put dimples in the floor of an a-body to show where the buckets seat bolt holes would go if it had buckets.

any help is appreciated