Yep, the first one goes to your temperature gauge, second one is coolant temp for the PCM. It wasn't until 99-up that they became a single sender. The first location is where most ppl put the sensor for an aftermarket gauge and you can relocate the stock sender to an aftermarket fill neck that comes with a sender bung so you don't have a dead gauge.
2000 Mustang GT Steeda #0048 34k miles. 99 Cobra 4V swapped, FTBR IRS swapped, exhaust, tuned by James Gordon.
Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.