I don't know what motors were used on your machine but I believe they are all supposed to be the same. Since the motors should be reversible the hoses would need to be routed so they go the right direction when the fluid goes in whichever port. If that was wrong you would know that quickly.
If I remember reading about these years ago, The motors are piped in parallel between all four. I think I remember some discussion about the fittings being under sized some so that if one wheel lost traction and started spinning out, the small fitting would create back pressure due to the increased flow through that spinning motor, that back pressure would then be applied to the other wheels that had grip and hopefully keep the machine moving.
