The proper memory slots can be found in your owners manual, but for ram testing it does not matter. What you are checking is the ram sticks and the dim slots to find which is defective. Take 1 stick out and run the other stick for 7 passes or until you get errors. If you find 1 stick that shows no errors, test that stick in both slots. That will tell you whether the sticks are bad or the dim slots are bad. The installation is simple. There is a notch in the ram and a solid piece in the dim slot, match those two up and you have the ram oriented correctly. The below video is not great, but shows the process. It is very simple.
Here is the tutorial if you need instructions. RAM - Test with Memtest86+