Installing a Supco 3 n 1 compressor starter - what to do with extra power line?

My Kenmore fridge had 3 power lines running to the side of the compressor. The Supco hard start kit only tells you what to do with 2. The 3rd power cable in my situation was coming from my thermostat and running to the overload. My solution was to splice this 3rd cable into the "common" line of the Supco 3 n 1 kit.