According to the wiring schematic there are no dedicated DRL cables in the loom. There is cabling for the optional front foglights (blue/yellow) and wing top sidelights (red/orange and red/black) though which would explain the cable tails you have found.
To fit DRL's you would need to provide a fused ignition switch feed and have that provide power to same via a diode relay controlled by headlights such that DRL's extinguish or dim when latter are on. It depends on the legislation for such in your country.
