The small plugs on the left side of the Touch Control block just block passages, no loose parts are behind them, I think.
I would clean the unit well along the bottom area, and where the weld is, and run the tractor and see if you can see where it is leaking. It's possible it is leaking at the weld.
Hard to say why it is broken and welded there.
I think someone had one that was broken and welded, and was leaking, on here before, and they said to buy another Touch Control unit and replace it.
I would check yours and be sure the weld is not leaking fluid out.
