Netural Safty switch location

Where on the trans is the netural saftey/reverse light switch in a 2002 Dakota 4X4? Truck won't start with key,OBD says P1899, bad netural saftey switch

it is near or on the shifter

Thanks! I thought that was it, parts store kept insisting the switch they gave me was correct and I couldn't find "that" switch, I now have the correct one from the dealer.