I am switching from a Janitrol 18-60 to a Honeywell RTH6450 and cannot figure out where the W2 wire goes. I have an E ( which is black ) in Aux/E. W2 is Aux as far as I know. Do I place W2 and E in same slot or what?

What were the terminals & wire colors on the old stat?
What are the terminals on the new stat?