Unused coolant switch on v-8

[delucat2]

I noticed there is a unused switch on the t-stat housing next to the coolant temp sender. This is a 1.8 NPT switch - part # 38720-AA010 - single wire, so it can only be either for an idiot light or another switch - like maybe it is there in case an electric fan is used on another model? Its unused and I can't find a unplugged connector nearby.

Anyone else notice this?