Which terminals are the front and trans?

I want to install a video doorbell, but don’t know which terminals to short. Thank you.

Hi @philipt18. The terminals are typically labeled with either the words or a letter to indicate if they go to the front door or the transformer. I can’t see anything labeled too well on the photo you shared, and I don’t want to speculate. You may need to consult a qualified electrician if it’s not clear which terminal is for which.