When setting up the power meter that came with my Tarmac on my Garmin I needed to sync both sides then it made one overall connection.

But with Zwift I’m not seeing a way to do that. It shows each side and pick one to connect to. I pick the side I’m supposed to select first but I’m wondering when doing that does it pull power from both sides or just double the one side?

Obviously I’m looking to read both sides together. Am I doing it right or wrong?