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The totaline does't have the E connector. For whatever it may help someone, original WR is an 1F89-211 (heat pump T-stat) although I don't have a heat pump.
I believe the reason for this, was...

I am replacing a white rodgers thermostat (with emergency heat setting) that is controlling in floor heating in the main level of my house. It is non programmable. I am replacing it with a totaline...