That's the air flow sensor position indicator and connector. Physically trace the pigtail from the TPS to its connector, which should be in an accessible location. On my 2.6 it is above the #1 inlet runner.

The TPS on the 2.6 is three pole - ground, idle, and WOT, but some KE systems may only have a two pole TPS without a dedicated ground wire.

You run the continuity tests on the TPS pigtail. You want to test the TPS, not the harness to the other end.

Duke