Follow Campus Drive around. You will cross Palm Drive, and also Quarry Road. Shortly past Quarry Road, take a right turn on Roth Way. Roth Way will dead end at the Medical Center, which is large, yellow building. Still facing the Medical Center, the next building to the left is the Fairchild Center.
Registration is located here.
You can download the schedules and maps from the Marguerite Shuttle web site. Schedules and maps are usually available on the shuttles themselves. The B line stops at the corner of Nelson and Galvez. Cross Galvez to take the B line in the 'Hospital Fountain' direction. Take the B line to the corner of Galvez and Serra, where the Hoover Tower will be a prominent landmark and the shuttle will turn left.