you take one end and connect it to a 12v resistor cause if you hook them to the battery they could pop unless theres so many lights that they pull power from each other and you can connect it from pos to neg
if your not using a resistor make sure theres more then 1 LED but you got a strip so you might be good depending on the power rating of the lights.
take one end to the pos and one end to neg
if you take a normal LED and a 9v battery and connect it directly the LED will litterally explode
