I need to connect from a USAirways Shuttle flight from LGA to a UA flight. Of course, US uses Terminal B and UA Terminal C.

In looking at the USAirways map (http://www.usairways.com/common/reso...minal_full.jpg) it looks like there is an airside bus that will allow me to connect from Gate 9B in Terminal B to Gate 19A in Terminal C. Can anyone please confirm this is the best way to get from B to C?

FWIW, I have a three hour layover so having to walk and re-clear security wouldn't kill me.

Thanks!