Yes, if you hook up just two wires then they will work as 'side repeaters' only. You need one wire from the turn signal ground(or another ground)and one wire from the turn signals 'pulsing' power wire. I forget the colors right now but there should be three wires into the turn signal bulbs harness(not the side markers, the stock turn signals). One is ground, one is parking light power, and the other is turn signal power. Wire the turn signal power to the positive of your side marker and the ground to the ground of your side marker. Thats all you should need for 'side repeater' operation. I think you can also install a diode on the power wire to stop back flow to the stock bulb but I can't remember if it is absolutely necessary or not.
