If the mower has a solid catcher you can just cut the left side out of it.
Just be careful because while it will throw long so the clippings will vanish very quickly, it will also throw high so nasties can end up going through windows , hitting bystanders etc.
Down here it was common to make a side discharge chute that just replaced the catcher with a bit of a diverter on the top to limit the height of the discharge
I have seen some rear flaps cut out & fitted with some aircon tubing to do the same thing .