I guess the photo is a fascinating insight into how it was hoped things would develop.
It isn't all that clear in this scanned image, but minidaz is correct - the c5 is resting on some sort of stand ,painted a similar colour grey to the chassis of a c5.
Personally I find placing the c5 on a Black&Decker workmate makes life easy enough. The angle of that stand seems quite strange , not sure how comfortable the engineer felt working like that.
Alan is right, this c5 is a bit of a challenge - but then "half-pint" was in a similar condition so I'm hopeful this one can be saved and put back on the road. it is remarkably complete, which always helps !