I think I know now what you meant. The golden pin on this picture (in the left) is where you have to put you gasoline.
When you look at it from the top you see to black cableguides. The one in the middle is for your gashandle. The other one is your choke. You should insert a manual choke there. Your old carbureator had an electronic shock. This is a manual one.
There are also two silver pins lookin downwards, one on each side of it. You can leave them like this.
Seems as if you have no vacuum pin and no oil pin so you need to mix yourself.
But I'm not sure what the thing in the middle on the picture shows. Is this another pin?
Hope I could help you.