GE 3-Way Smart Switch Questions

I had posted in the wiki but I don’t think that’s the right place to post questions. Sorry if this is the wrong place as well.

I am trying to install the 3-way switch and have a few questions on my light setup. I don’t have a red wire so it makes it a bit harder. The “traveler” wire almost looks like the neutral wire. I’ve made a spreadsheet of the wires when they’re on and off. It looks like the switch closest to the garage is the source of power. The white wire on the left side and the black wire on the top come from the same wirestrip. (White, black, ground). The bottom black comes in through another wire so I’m assuming that’s the one connected to the box (white, black ground).


The pictures of the boxes and wiring can be found here.