It's not that hard if you get a cheap multimeter and test the wires. There's only 2 or 3 you need to look at. One is ground, and the other supplies 12V whenever the blinker is active. The DRL wire is the one that's always 12V when the car is running. So for all the bulb sockets, wire one end of the resistor to the ground wire and the other end to the signal wire, and it should work.
Here's a drawing someone did:
