scroll lock key on the macbook

hello! i have an LED gaming keyboard that lights up when you press the scroll lock key. it works fine when i try it on a PC but when i plug it into my mac and press the scroll lock key on the keyboard, it either changes the brightness of the mac display, or does nothing at all.

i downloaded karabiner off of github but it doesn't seem to be helping (i might not be selecting the right keys). there also isn't an option for scroll lock in apple's native settings, afaik. i'm a tech noob so there's only so much i know how to do haha please help, thanks!