where the block meets the bell housing on passenger side there looks like a threaded hole and i have a slow oil leak i think does anyone know what it might be?

 

i dont recall any screw in plus leading to oil galleys.... the only ones i know of are in the back by the cam freeze plug - but thats behind the flywheel in the rear center of the block. theres also a small freeze plug the size of a nickel behind the intake on the top of the block, but i think that one is actually under the intake if i rember correctly

 

oil galleys??