Might be missing a carb piece - need confirmation

I was putting a carb kit in my 1998/99 F15MSHX and after removing the carb from the outboard and taking it apart I cleaned up the bowl. After the gasket and screen had been removed, I blew out the bowl and I saw a tubular piece fly out and I thought I might have also seen something silver come out of the same hole. This hole is in line with the screw holes. I found the tubular piece but couldn't find anything silver laying in the area. I looked up the schematic for this carb and the hole and the tubular piece are not in the drawing.

I took a pic of the tubular piece and the hole it came out of.

I need to know if there is another part that goes in this hole.

This is for a 1998 15HP Yamaha 4-Stroke Outboard.

thanks for any response, including laughter - mike

The mfg drawings show the diaphragm entering the side of the carb where this hole (see new attached image) is but if you look at the previous pic above, the diaphragm is attached to the side of the carb at 10 O'clock.
The hole on my carb does not go through the bottom as shown in the diagram.