For those that are considering DIY fitting of BMW OEM LED spotlights here is my experience.
The whole package arrived in 1 box, part No. BM-77. 51. 5. A2A. 478, includes 2 x LED spotlights, mounting bracket, mirror mount switch, wiring harness with connectors, hardware etc. There was no installation instruction sheet and the best I could find was a posting from SnoDrtRider on this forum. (Thank you very much).
Access to the existing 4 torx bolts which hold the bracket is "challenging" without removing any of the fairing or headlight mounting panels but with perseverance and an array of 1/4 drive extension bars including a universal joint it can be done. (I did remove the half plastic fan disc under the steering damper.)
OK bracket now mounted and secure. After mounting the switch and routing that wiring next was finding the existing power take off connector block in the bikes wiring harness which is located under the front panel on the left, trying to detach the connector block (which is only a blank protector) so you can then detach the small block with the original wiring proved another head scratcher, however I discovered it is secured by a little plastic housing with a spring clip and by gently pulling it in a horizontal direction backwards, i.e. towards the back of the bike it releases then you can release the plug ready to go into the provided new connector and LED's wiring harness.
From there it is relatively easy to secure everything back, connect the switch wiring block, mount and plug in left and right LED lights, route and cable tie the wiring, being careful to make sure all is very secure, nothing fouls the movement of handlebars or steering damper.
When done the whole job and lights do look neat as if fitted from the factory. Bike is now booked into the local dealer for them to let the computer know the LED lights are present (I have to wait nearly a week for an appointment) and then, hopefully fingers crossed, all will be well.