To reset the CMOS you only need to remove the battery and put it back right?
Sorry I'm not too experienced with this.
There are a couple ways to do it, but that's the universal way, take out the battery, leave it out for ~10 seconds, put it back in. A lot of modern motherboard will have 2 pins that you can bridge, either with a dedicated jumper or just sticking some piece of metal (I.E. a knife or a coin) between them, that you do for 10 seconds and it will clear it. Some higher end boards will even have dedicated buttons for you to press to clear the CMOS, usually on the rear IO (though there are boards with them in weird places).
Pick which ever way ends up being the easiest. Usually pressing a button is the easiest way, then the pins, then removing the battery, though there are boards with things in really weird spots and if you don't wanna think about it, just remove the battery for 10 seconds and pop it back in.