[C. Ludwig]

You can use the connector terminals, like you're suggesting. They'll fit snuggly until the potting compound sets up. Make sure you setup a proper boot, as shown in the images. This will provide strain relief. Without that, the wires will get broken off at the sensor pretty quickly.

Not sure whyPeter has an issue with the Metripack connector in the first place and is suggesting such a "fix". Other than being pull-to-seat, which is more difficult to work with, there is nothing inherently wrong with the connectors. They're OE quality and will provide good service for as long as you're going to use them. My guess is, whatever you choose to use on the pigtail extension you plan to make will be of no greater quality than what's already setup to use out of the box.