There was a small little hole in the sill on the front left side, but after inspecting it a little further the small little hole reveals as a dirt and rust filled water holding mess. I drilled a hole below the sill for the water to drain off, an sawed the hole into an rectangular shape:
I’ll need to learn welding of some sorts to fix that hole in the future. I am currently not owing a welding helmet, I would like to get an automatically darkening one, but these are usually above 100€ a piece. Hopefully I’ll find a cheaper solution to that.