I connected mines with fuel Injectors fuse. When ignition on DRL on. When ignition off DRL off. You can also connect them with fuel pump fuse. Both fuses can be found in engine bay.
I have also installed a switch to wire it up. (I bought this switch from eBay. Very cheap, about $5-6. just search DRL switch) This switch has five wires. Two wires for DRL (output) and on other side one for negative, second for battery or power source (fuel pump or injectors fuse etc) third wire for headlight. So when you turn your headlights on it reduces DRL's brightness.