There is more to this puzzle than just the connectors. The wire used in that setup was special. Don't know who the engineer was who thought up that crazy system but it can be a headache to work out. First off, do you have the sensor for the wax motor unit. It is mounted in a water passage on the side of the head. The OEM part number is 3915945. Also found under Case tractor part J915945. Case shows that part number discontinued but replaced by part 87608380. Hope you don't need one because Case sells that for $329.88. Ouch. That is not an easy part to find. It has been obsolete for a long time. The wiring harness is part 3918364. Cummins price for that piece is $244.78 but shows to be out of stock. There are other sources that show it in stock for a little over $200. Darn expensive piece of wiring harness. Also available from Case under part J918364 for $309.58. This part hasn't been used in applications since around 1990.