Thank you Amnezida and Kiwi. Would there definitely be a 12v wire and a ground wire in the bundle of wires that go to the turn signal/horn/hi-lo/flasher unit?
I have installed this system on mine. I didn't find 12V power in the same cable bundle from/to turn signals. I found one on the cable bundle that is nearby of the empty space where you would put the DC power relay, there are two big cable bundles one for the relay which is disconnected (unless you already have the relay) and another bundle which has multiple cables. Red and black are 12V but there are multiple reds, use a multimeter to find the correct ones.
Took me a while (and lot of frustration) to find 12V power. Not too happy with it and will probably remove mine and go back to factory and sell it or throw it away, nothing wrong with it but sometimes (not too often but it has happened) turns off the turn signal before it should so now, more often than not, I find myself double and triple checking if the turn signal is still on which is a distraction.
EDIT: I just removed mine and took pictures of the 12V cables that I used. One is the FULL red and the other one is Black with yellow line (see pictures below).