no it is not #8. to me #8 looks like the mounting of the shifter to the shifter frame.

I left a link which should go to an ebay auction containing it.

it's the frontal mounting point for the shifter assembly. "feet" mounting flanges, whatever they are called.....on your diagram they are the things that #12 attach to but not pictured is the black bracket.

if you click the link it is the only black bracket in the picture.