I've put mine together as it was.
I've bought these bolt new because it was too much rusted, need to use a lot of force and WD-40 to get it off.
The bolt is 55mm long. Should be put in from the inner side. 60 is to long (you can't put it in, because of the chassis) and 50 is just to short.
I recommend that you put things together as they were before