SLI or Crossfire

Ok, Well i am a first time computer builder, thought i hade everything correct and then crashed an burned. My problem is this, motherboard http://www.newegg.com/Product/Product.aspx?Item=N82E16813131397 is crossfire, ordered two graphic cards http://www.newegg.com/Product/Product.aspx?Item=N82E16814130441 are sli and a powersource witch is both sli and crossfire http://www.newegg.com/Product/Product.aspx?Item=N82E16817815003
 So put it all togeather and am like wheres the little chip that goes across graphic cards, and learned my mistake. My question is this, can i rectify this problem without returning motherboard or graphic cards, can i just buy a sli bridge or crossfire bridge, if so witch? Will it slow down or be incompatable on the computer? Hate to do this but am i better off swapping out the motherboard? Any comments or links to a bridge that would work or best action to take would be greatly appreciated. My newbish skills at building a computer just went up, lol thank you for any ideas.