ok well the canister thing is the fuel pump - the "vacuum lines" are the fuel lines, inlet & outlet. The outlet divides into 2 just under the tail of the tank, and these 2 lines go off one to each carb.
The electrical connection is the pump's power supply.
now that stray wire may be the same one as the fellows (B) in the pics below (can't see enough in your photo).
or it could be one of the many connectors which hide under that plastic sleeve (A), as per the other pic below. have a look!
Lowering the tone since 1969