It’s simple identify the voltage of each light as well as if they run series parallel or a series parallel hybrid, this will tell you how much voltage is needed to run the leds there may be enough in series that they require 120v to activate which case cut into smaller segments and run off relevant source, you can find out each lights operating parameters by either using a multimeter or ur preferred analyzing tool I’d actually start low and work up in voltage if u want do the oOoO method by hooking it up to random batteries to see if it works always start low so you don’t fry ur lights.