206 1.9D Power Steering/alternator Belt

[jimbob 3]

Hey guys I've been out on the drive swearing for a little while now and hoping someone may be able to help me out im replacing the belt on my 206 diesel (1.9 1999) and im having no luck with tensioners! I can't seem to find any specific info for my set up on the Internet but I have the power steering top front of engine, alternated below it and I believe a pulley for the oil pump back rear. There are what I take as guides between the steering and oil pumps and the alternator and oil pump, then there is what I assume to be the tensioner between the steering pump and the alternator that the belt loops around.

The bolt in middle of what I think is the tensioner just loosens it off there is a large Allen bolt above it that seems to loosen it but it doesn't seem quite right......

 

HELP PLEASE!?!?