Hello and welcome to just answer Dodge. Here is the procedure from the factory service manual for you. The thermostat housing is next to the oil filter. You will need to get under the vehicle to do this. Hope this information is helpful. Let me know if you need more assistance with this.
WARNING: DO NOT REMOVE PRESSURE CAP WITH THE SYSTEM HOT AND UNDER PRESSURE BECAUSE SERIOUS BURNS FROM COOLANT CAN OCCUR.
Yes it is to the left and a little bit above the oil filter. The oil filter does not need to be removed. Hopefully the diagram I sent you will help.
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