You can right-click on the switch and change {S} to 1 or 2.
Or do a Spice Directive of .param S=x where x=1 or 2.

The arrow does not move on the schematic but the connection is still changed.

View attachment 349271 View attachment 349272
You have D2 connected in series with M2, which will prevent it from conducting. It's not going to V+.
I labeled the V2 power supply net (node) V+ (Label Net command) on my schematic.
I added the dot on my resistor symbol to show which side shows a positive voltage for current into that node.

Ok. I agree with this. I connected it in parallel to V2 power supply (V+?) and it just bypassed the entire circuit to output 12v which does makes sense looking at the circuit. I deleted a section of the wire before I saved it so that you can see. Am I supposed to connect it to a separate 12V voltage source in reality?
Also - I tried what you did creating a net of out as an output and then an input and it isn't working either... in one switch setting it works in both circuits and in the other switch setting it works in neither! I could not find the relays you used but tried just using a load resistor in both settings. I apologize for my ignorance, I really am trying.

 

Am I supposed to connect it to a separate 12V voltage source in reality?

No.
D2 was also still incorrectly connected (see attached):

I understand you are trying, but you need to pay better attention to how the circuit will work
For example, it should be fairly obvious, that the way you connected D2 would not allow M2 to ever conduct current to ground, effectively not allowing M2 to do anything.

 

Here is an alternative circuit. It requires a DPDT switch.
I used AO mosfets and a 2N3904 to level shift but substitutes can be used.

The DPDT switch selects the relay switching polarity.

 

No.
D2 was also still incorrectly connected (see attached):

I understand you are trying, but you need to pay better attention to how the circuit will work
For example, it should be fairly obvious, that the way you connected D2 would not allow M2 to ever conduct current to ground, effectively not allowing M2 to do anything.

wow! I appreciate your patience... I was too fixated on the V+ net to even process what you were saying about M2 not having an alternate current path the way I had D2 placed... I get it now. Thank you so much.