In need of assistance with a B760M motherboard

So i discovered that my cooling fan rub light had went out a few months back. Usually I wouldn't care for cosmetics, but this is aggravating me just looking at it. Found out during my move a pin had broke causing this issue so im replacing the board, cables and possibly the cooling system all together for and All in one system cooling. Buttttt, i found out that apparently the motherboard in my Acer n60-640, a Gigabyte B760M, has a second SSD slot..... im just lost on where its at because im not seeing any possible areas