MSI's site is down at the moment, they must be doing some maintenance. But if I may offer some advice, don't be intimidated, it's really easier that you think. You could check out videos like
https://www.youtube.com/watch?v=b6q4h-lNHrU this one, but in the end it comes down to what your motherboard manual instructs, and sticking to those instructions. Some motherboards have the area in question color coded to make things easier. Yours isn't one of them from what I'm seeing, but don't despair. If need be, use a magnifying glass to help you. Just understand it isn't as difficult as you think and proceed to connect as per the manual's instructions.