Hope i am asking this in the right spot. i have been trying to find a answer for this but have come up with nothing.

I am using a Logitech M510 mouse, it has two side buttons, i would like to use them in game(instead of ctrl to use hotbar 2/3/etc) but can find no way to get the game to register that they are there. they are set to forward/back by default in the mouse software. i have tried setting them too other keys suck as page up/down, but that doesnt work either.

is there a way to get the game to register those 2 buttons?