IIRC that is what I done but it was a long time ago. I did not want exposed plugs getting water in and wanted apart from easier towing I also used the mod to maintain control over the electric cooling fan, mine is all electric and has been for I guess seven years? Cutting the wire stopped the CDL engaging when in low, then fitted the switch in the dash and all good. I then found that cutting the wire also affects the auto box, mine being manual it may not have been needed?
The fan system was modified a couple of years back as the fan model I was using was no longer available new, so now I use a modern PWM fan, this gives better control over fan speeds which includes everything from idling in traffic, AC and post shut down cooling.
regards
Dave