@Wayne-TP I figured it out. Line to box 2 was coming from box 1. Just had to connect to main line and transfer the load from box 1 to box 2. I now get Box 1 with line, neutral, 2 travellers and box 2...

New install. box 1 : Line, traveller white, traveller red box 2 : load, neutral, traveller white, traveller red I have to use one traveller to transfer Line or neutral to one box so I can install the...