I do not know for sure about the 104, but it does go in the linkage attached to the rockshaft on the right side of the tractor. be careful about leaving it locked though, there is another thread on here right now where Sam Mac just posted abotu the fun of replacing broken spirol pins. you are generally better off to add weight to your impliment instead of using down pressure, since down pressure removes weight from the rear wheels. although it would make it nice for adding/removing chains
