The back left head by firewall is leaking oil from what apears to be a plug of some kmind. Looks like a 6 or 7 mm allen screw? Anyone familiar with this and is it just a plug that is not sealed properly? I don't want to unscrew this without knowing what it is? The oil is leaking from that..

 

A picture would be helpful.
Often time oil leaks in that area are the result of a bad gasket or improperly torqued bolts.
Perhaps try tightening the bolt, wipe it dry, and see if the leak returns.