Help Please. What part is missing here?
 

Thank you for any help... my friend's mother noticed a hose or pipe missing when she looked under the hood today. We can not figure out if it was missing before or after we took it to the mechanics a month ago. Can anyone tell me what is missing? It looks like a hose connecting to the exhaust manifold? Again thank you for any help.

The vehicle is a 1993 Volvo 940

Here are the photos

Victor and Jane
https://cimg6.ibsrv.net/gimg/volvofo...f9d51a226b.jpg
https://cimg7.ibsrv.net/gimg/volvofo...870f05b704.jpg
Thank you for any help... my friend's mother noticed a hose or pipe missing when she looked under the hood today. We can not figure out if it was missing before or after we took it to the mechanics a month ago. Can anyone tell me what is missing? It looks like a hose connecting to the exhaust manifold? Again thank you for any help.

The vehicle is a 1993 Volvo 940

Here are the photos

This is the PREHEAT hose, not all that important except for California visual inspection. Cost around $20... You won't notice any difference.