PS Audio 4.5 Preamp switches

Hello
I have been restoring my PS preamp 4.5 circa 1986. With all caps replaced, the constantly flipping of the PCB came with the output selector switch cap being unsnapped. The face-plate markings: On/Off, Straightwire, CD. Phone have 4 indents. I lost the ball bearing but retained the spring. I have located the ball-bearing size on line as well as direct replacement bu Lorlin. Problem is I do not know how to indent the switch to those output markings? There are 12 slots behind the blue covering. Also, There is a cap 2200uf 16V axial by the TIP transistor which originally is soldered to a bare wire bridge on the negative side and a PCB hole with no connection. May of been just a solder eyelet but with no connection? Is this so? Help.
Anthony
 

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