"What to do with the W2 (and maybe W1) wire?"

I am replacing an old Payne thermostat that controlled a heat pump system which provides heating and cooling, along with "emergency heat". The new unit is a Honeywell RTH3100C.

I labeled all the wires as I removed the wires that were attached to the Payne unit (there were two wires that were not used in the old installation which remain unconnected in the new installation). I attached the wires (WIRE) to the wiring block of Honeywell unit (BLOCK) as follows:

B - W
L - I
O - R
C - E
K
====
E - E
Aux- W1 (not sure if this is correct; manual states Aux, W, W1, or W2)
Y - Y
G - G (manual indicates F could alternatively be connected here if no G)
O - O
L - F (manual indicates F could alternatively be connected if no L)
R - R
B - n/c (I don't have B or H wires in the old thermostat connection)
C - n/c (not req'd for new thermo w/ batteries; old thermo had no B or X wires)

The manual said that if the old thermostat had w1, w2 and y wires (which it does), I need to contact a heating cooling contractor for help. I've got a W2 with no obvious connection (I connected the W1 to the Aux connection). What, if anything, should the W2 be connected to?

The heat pump consists of a coil unit, BDP (Carrier?) 541CB048 and the main blower/aux heater, BDP (Carrier) 517EN048.

The old thermostat was a BDP Co (Payne) 34427DP117. The wires were connected to G, Y, E, O, W1, W2, F, R

I'd really appreciate any insight you can give me -- it's starting to get cold :)

====
E - E
?
Aux- W1 (not sure if this is correct; manual states Aux, W, W1, or W2)
This should contorl the emergency resistance heat

Y - Y
This starts the outside unit for heat or cooling

G - G (manual indicates F could alternatively be connected here if no G)
This is fan on

O - O
This controls the reversing valves that control heating and cooling.

L - F (manual indicates F could alternatively be connected if no L)
This may be the regular heat. Maybe mixed up with W1

R - R
Hot from the transformer

B - n/c (I don't have B or H wires in the old thermostat connection)
?
C - n/c (
Common, other side of the transformer, needed in some cases to power the thermostat.

Maybe this will help, and maybe somebody that knows more about heat pumps will have to help. Doing what I can.