If you don't want the expense of buying the CBS kit, you can just use a standard 30 amp, 5 pin diode relay. Wire the relay coil to dipped beam supply (pin 86 +, 85 -). Take an ignition feed to the relay main contact (30) and on to DRL's such that when coil is de-energised the DRL's are on with ignition (pin 87a) but as soon as dipped beam selected they are extinguished.
Given that you are just replacing wing mount bulbs (which are on with headlamps as OE) the LED replacements although brighter may still qualify as side/position lights so possibly no need for above.
