Electrical Questions? Ask an Electrician Online.
Hi, I'm Mike G and I'll be assisting you. Let me review your question. Stand by.
That switch requires a companion switch at the second location. The main switch should have 4 connections and the companion only has 3 connections.
The main switch has a hot, switched hit, traveler and neutral.
Where did you purchase it?
Might want to contact that vendor for the correct main switch first. If not available check at any home center for a 4 wire Leave switch.