I replaced my valve cover gaskets and breather tubes - putting it back in place, I don't remember this empty threaded hole left of the left-most coil pack. Is this for the transmission tube on other models or did I lose a bolt?

And yes, I am using the red hi temp gasket maker and I made a mess and I'm probably going to have to do it with the right stuff Thanks in advance.

Not sure why this photo isn't appearing now, this is it: