Can't locate temperature gauge wire?

I just performed a lower intake manifold replacement this weekend, and the only thing left undone is the connection to the temp sensor near the manifold thermostat. Car is running great, but now I have a temp sensor high indication as a result of this missing wire.

My fear is that the missing connector was unknowingly folded beneath the upper pleum when resinstalled, but I could swear all the wiring that feeds the injectors and other items was faithfully routed and connected.

I performed an exhaustive search with no luck, so I'm at the point of removing the upper untake plenum again to search for my missing connector. But before I do, I was wondering if anyone could be so kind as to give me vector. TIA