The ones I linked have two wires. The red one connects to ACC power - so whenever your ignition is on, DRL comes on (assuming that's how you want it).
The white wire is optional, it's a DRL override. I connected it to headlight wires, so that when the headlights are on, the DRL's turn off.
These things are so bright (and unfocused), that you definitely don't want them to be on at night, so you want them to go off when the headlights are on.