Oil pan hole, what is it?

[burner31]

Can someone tell me what the hole in the front of the pan is?
Our local history museum has a 1917 Model T that I am trying to get running and I seen this hole...what the hell is it? What hooks up to it (steering rod?)
It's at the front of the pan left side on the picture, can't miss it.
I'm volunteering my time and labor (working alone), I'm a model A man myself and know nothing about T's.