Is this the Aux belt or air con belt?

[The Gidfather]

Can't figure it out from above- is it air con belt? Near the front of the engine, to the left of centre if looking from the front of the car to the back. Belt with the green writing and 11.28-7512 762-163667 written on (can't find this to relate to anything)

2003 e85 3.0i

 

[MrPT]

It's a/c. In the middle pic you can see the compressor with refrigerant lines coming out of it.