So I bought a rebuild kit for my carburetors and I have two sets of different size o rings along with a thicker single o ring? I replaced the o ring for the idle screw and the fuel rail but can't seem to figure out were the rest are meant to go?

 

Those go to the carburetor that was built for a 1980 Honda CM400T. You have a carburetor for a 1978-79 CB or CM 400 I’m guessing. In 1980 the carburetors changed, and you’d need the correct kit for the correct carburetor. VB22A is what’s stamped on a 1980 CM400T carburetor. I’m pretty sure VB22C and VB22E are also okay for a 1980 CM400T.