@KLoNe, the light pattern in your picture is for right hand drive vehicles (that drive on the left hand side of the road). The cut-off is designed such that light is not projected upward towards, and blinds, on comming vehicles. In left hand drive markets, the cut-off pattern is reversed for obvious reasons.
Further, HID and LED headlamps are much much brighter than halogen headlamps and as such must meet different design rules that require auto levelers and headlight washers are included in the vehicle design. The reason for these requirements is again because HID/LED headlamps are much much brighter that halogen headlamps and they will blind oncoming vehicles if such components were not included in the vehicle design.
Complying HID or LED headlamps is a technically and beurocratically a complicated and costly process. Vehicle manufacturers will not take short cuts in the same way as these back yard Halogen replacement HID/LED globe insert manufactures do. And as yet i have not found any HID/LED globe inserts that are legal to use in a Halogen lamp assembly. Usually these inserts state "not for road use" for a reason - they are illegal on road vehciles and render your ride unroadworthy...
So, if you are not sure why the headlight cut-off is shaped the way it is, then i'd suggest that
@EYY is correct in saying Holden Engineers know more than back yarders (and i'm including the aftermarket Halogen replacement HID/LED globe insert manufacturer in this category). So best to understand that what you are doing renders your vehicle unroadworthy and will almost certainly blind other road users and may even cause an accident.
If you don't understand the basics of headlamp design let alone roadworthy requirements of light projection, then i'd say its best to simply stick to what the manufacturer designed for your vehicle. After all
Clint Eastwood said it well