It's redundant, not even needed so you'll be fine.

I've hit fuel cutoff many times and never had an issue.

Every aftermarket TBI system I've ever seen and every harness I've ever built has no Oil Pressure switch. They all run off the relay only...

That piece lionelhutz linked to is under the T stat and should flow good water. Just as the heater hose pictured would. But that heater hose could not have any kind of hot water cut off like some...

Gotta remember there's no flow of water in the T stat housing! Well not until it opens. The CTS needs a constant flow of water always so it knows when it's cols and what the temp is as it warms up....

Whatever you do with a "T", make sure the CTS is sitting very deep in the "T". If you just get the tip of CTS in flow it is not accurate.