The wire coming out of the carb is the throttle cable,
The other end of it should go to the throttle control; the twist grip on the right handlebar.
If the thing on the handlebar that you are pulling on looks like a silver/gray lever about 5" long, that would be your front brake lever. The black rubber handgrip that twists is your throttle.
If you already have a carb I can almost guarantee that it needs a thorough cleaning. Here are detailed instructions on cleaning it -