I'm currently trying to add a Amazon smart thermostat to my Trane UH2B060A9V3VA furnace. When I had my AC service earlier in the year I mentioned the project to my heating and cooling guy and though I don't have a C wire he said I could add the thermostat to my system as long as I got a c wire adapter. He told me if I brought the thermostat and adapter he'd set it up when he serviced the furnace. He was to come today, but there was a mix up and a new guy who was comfortable setting it up came out. I figured I'd set it up myself, but as I was following the instructions I realized I have a W2 and a w wire and the adapter only has a spot for the W wire. I did some research and apparently I have a 2 stage furnace. My main question is, is there anyway I can still set up the new thermostat or is it simply incompatible with my system? I'm including some photos of the wiring at the furnace and thermostat. And suggestions would be much appreciated:)

I'm currently trying to add a Amazon smart thermostat to my Trane UH2B060A9V3VA furnace. When I had my AC service earlier in the year I mentioned the project to my heating and cooling guy and though I don't have a C wire he said I could add the thermostat to my system as long as I got a c wire adapter. He told me if I brought the thermostat and adapter he'd set it up when he serviced the furnace. He was to come today, but there was a mix up and a new guy who was comfortable setting it up came out. I figured I'd set it up myself, but as I was following the instructions I realized I have a W2 and a w wire and the adapter only has a spot for the W wire. I did some research and apparently I have a 2 stage furnace. My main question is, is there anyway I can still set up the new thermostat or is it simply incompatible with my system? I'm including some photos of the wiring at the furnace and thermostat. And suggestions would be much appreciated:)