Front gearbox oil fill bolt

I have a 2020 KIngquad 500 with 45 hrs that still has front gear oil it came with. I was able to change the rear very easy, but not the front. Does it take an allen or a torx and what size. I've tried all the allens and torx that I have and it won't budge. I wan't to do it myself I'm a73 yr old disabled Vet and can't afford to spend the money taking it to a shop.

Thanks