I have a Carrier central air compressor/condenser unit where some idiot cut the 24v line from the furnace. On the outside they hook to a blue and brown wire inside the exterior unit. In the furnace end I hook to blue and yellow. Is there a polarity to these wires (such as yellow to blue and blue to brown) or does it not matter?

Heating & Cooling - Carrier - 38CKC036 Air Conditioner