Looks like the detent lever, that rubs against the notched shift lever plate. The two combined give you that sweet ratchet feeling as you move the shift lever through it's positions. It appears to bolt onto/through the valve body. I would not expect it to be included with a replacement VB, you would just move it from the old one. I suppose it might not be present if it is a purely electric shift model (if you have a knob or up/down buttons instead of a shift lever).

 

thank you very much for your quick reply sir! That's what I was figuring.