Replacing very old White Rogers thermostat

Need helps on replacing a very old White Roger Thermostat please!!!

 
 
 
 

I am going to replace the existing one (picture-1). As you can see the 2nd picture, 4 wires come out from the wall; White, Pink, Orage(?) and Black. The RC and RH are jumped together on the thermos.

 
 

The Pink one is connected to the RH.

 
 

The White one is connected to the W.

 
 
 
 

Name: White Roger Thermostat Panel - Copy.jpg<div style=

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Name: White Roger Thermostat Wiring - Copy.jpg<div style= Views: 0

 

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I’m going to buy this one:

 
 

https://www.amazon.com/White-Rodgers…YD034WVBQ4RYTK

 
 
 
 

Here is the manual: http://www.emersonclimate.com/Docume…/0037-7260.pdf

 
 
 
 

I have a question about the BLACK and the ORANGE ones; how do I connect the 2 wires in the new one?

 
 
 
 

Appreciated for any helps!!!

 
 
 
 
 
 
 
 
 

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