What is the part number for MSD small block dizzy cap

Stupid, I DO have the female type cap, 8433.
I got the wrong one!
That said, when I blow up and do the 360 degree view of it on Summit’s site, it doesn’t have that little tooth to mate with the cutout in the dist base.
The wrong cap, like I ordered does, but the correct cap doesn’t have that locating tooth
What gives?