How to wire PYLE PLR24MPF aftermarket radio?

Im stuck with this 2 channel pyle but my car is a 4 channel. now i have checked and rechecked to make sure that this will work with my car and it does. i got the wire harness so that i can keep my original wiring and just undo that when i want to upgrade my stereo. My question is how do i wire the left and right speaker when it only has 1 wire per speaker. a green wire for my left and a grey wire for my right. now my wire harness has a LF positve and LF negative. RF positive and RF negative, and so on and so forth for my rear speakers. do i hook the green to both the positive and negative of both front speakers? any help would be greatly appreciated