OM602 project
OM602 project
That bolt-on part is the cruise control. The main thing you need is the vacuum control valve which bolts onto the side of the pump where that orange bolt is in your picture. I would get one and see if it fits on there.You can also try to see if 602 throttle linkage will work (the 603 cruise + linkage you saw will not fit in the smaller space on a 602).