Your carburetor would take the place of the throttle body because it has a throttle body already built into it. You just install it just as it is before the super charger where it will behave under normal circumstances because it is before the supercharger thus not experience any increase in air pressure. If the carburetor was 'being fed' by the supercharger, thus located mechanically after the supercharger it would be experiencing conditions dissimilar to it's normal use, if would be under pressure. You can work around this but the easiest format would be, carb to supercharger inlet and supercharger outlet to stock factory manifold.

I am just wondering how would I go about fitting my webber carby before the SC does that mean that I would have to figure out a way to plumn it into the intake of the SC?