Trying to get my 2 bbl Carter BBD back together with a kit, and the kits exploded view is lack luster at best in quality and I cannot seem to figure out where this part goes. Google exploded views don't seem to locate the piece either.. Mind you, it was not a rebuild piece but was already in my carb. It's Brass, and very small, small enough to fit the round accelerator shaft. But I'm pretty sure it wasn't located there. It's shouldered like this on both sides.

Any ideas?