I just purchased a Gigabyte Z170x-Gaming 7 and noticed there are two ethernet connections on the I/O panel on the back of my case. Upon looking closer they appear to be the same color and have no labels to speak of. I know that one or possible both are advertised as "Killer E2400 gaming network/intel gigabyte lan" and have no idea what this means? Which of the two ethernet plugins should I connect to? Does it matter?