STS-111 UF-2 closeup view of the Space Station Remote Manipulator System SSRMS Canadarm2 pitch and roll wrist joints. The SSRMS Latching End Effector LEE is grappled to Power Data Grapple Fixture PDGF #1 on the Mobile Base System MBS, which, in this image, is positioned on STBD side face 1 of the S0 S-zero truss.