where do i plugin connect my 5.1 speakers wires into surround sound receiver?

when facing the tv- connect Front "L" left (left side speaker) Front "R" right (right side speaker)
Center speaker goes below TV, Surround Left speaker on the left side of your couch & Surround Right speaker on right side of couch, Do Not Connect them into "Surround back/Front high" that's for 7.1
i recommend Onkyo mid-class receivers cause easy to use & good value & nice sound modes.