How do you know it's 12V output. Is there a more meaningful label on the side of the PSU that gives the input/output rating of the power supply?
L = Live
N = Neutral
FG = Earth
In the UK Live is Brown, Neutral is Blue & Yellow/Green is Earth but you will have to determine the correct colours for your country.
Unfortunately the output stencil is partially obscured in the image so I cannot see if you have a +Vo & -Vo or if both are +Vo. If you have the former then be sure to connect output correctly else you may fry something important. If the latter then maybe they are different voltages.
Just take care.
Hi and thank you for replying! This is the item that was purchased which shows it as 12V. http://www.mpja.com/12V-35A-Ilan-Power-Supply/productinfo/16741+PS/
I think it may say it on the unit itself somewhere but I am in the office now and don't have it to check. I will verify that both outputs are +12V with a meter before I use it. Thanks again for your response!