Hi, I traced out the wiring for my existing (dumb) 3 way switches in the attached diagram. White wires are drawn in pink. 

I'm trying to install the KS230 Kit (V1.8) 3 way dimmers, where the back of the Kasa Main switch requires Line in and the back of the Kasa Satellite switch requires Load in.

The issue I'm running into is that the switch that has constant power (Switch 2 in the diagram) does not have a neutral wire in the box, so I cannot install the Main switch on that side. The other switch does not have constant power running to the existing switch, but it does have a neutral wire in the box.

Would I be okay to install the Main switch at Box 1 and the Satellite switch at Box 2 even though the power is reversed? Or could I pull power from the bundle of black wires in Box 1 somehow?