[JohannesG]

Now I've found what's right and whats not! I've looked closely on multiple images of MB trac 1000 on Google and found out that many have the extensions for hinges on the platform, so that part is somewhat original. The part on the cab is homemade by previous owner, nothing wrong with that either. The problem is that one of the screws holding one of the extensions is broken and thereby create some problems that made everything look wrong. Strange that I didn't spot this earlier. Also the fact that the hinges been there even when not in use have lead to wear on them.

In conclusion the same hinges fit both 900 and 1000 (as stated earlier), but 1000 has extensions going from the platform.

Still one question remains: Should I use a round-bar going from one side to the other or should I use shorter pins or screws for each side?