This is the switch at the bottom of the foot brake pedal that operates the rear brake / stop lights and cuts out the cruise control. 1981-1987 onward  Silver Spirit, Silver Spur, Mulsanne,...

This is the relay for the coolant level amplifier.  1977-1980 Silver Shadow II, III, T-2, Silver Wraith II 1981-1987 Silver Spirit, Silver Spur, Mulsanne, Turbo R, Phantom 

This is the cruise control bellows. 1983-1986 Silver Spur, Sliver Spirit, Mulsanne, Turbo (VIN 7220-17000)