If you want to go fully retro fitted you would need the loom and screen sensor,
What you might have seen is the eBay kit which uses a mk5 look alike switch and a small sensor placed on the dash which does work , only thing being is the Toledo /leon headlight switch is quite small compared to the golf counter parts so will stick out abit and not sit flush
Something like this
MK6 Euro Switch Auto Light Sensor Retrofit Kit For VW MK4 Golf Jetta Bora Passat
Yea probably this kit was used, it also had the function of position lights when unlocking the car with the remote, that was nice, might give this a try.
Sent from my iPhone using Tapatalk