switch 3 references voltage for my servo position
Your servo remains in an undefined state if all three switches are open-circuit. A simpler arrangement using two switches leaves the servo at its mid-position in a fairly low-noise condition, because both remote switches are open-circuit.

R1 defines the default state, while R2 pulls up toward +5V, and R3 pulls down toward ground. The switch chip and variable resistors can lie close to the servo, while the logic control signals can be remote. Be aware that the switch chip requires a logic supply and ground connection (not shown).







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If you really need the servo in an undefined state, a quad-switch like 74HC4066 can be used (one-of-four unused). As before, control signals can be remote, while analog servo voltages can be more closely associated with the servo:







simulate this circuit