BB 67580 Jouef equipped with a Fleischmann Profi coupling in a dovetail holder.
For almost 200 €: no elongation; not even a NEM coupling box. Cold white lights, so cold that they are blue! There's some work to do!
From the PCB, it might be possible to retrieve the lights control diagram. But it's a double-sided circuit, with a dark varnish and components placed above the tracks. Here is for the most motivated what I have deduced from it (without any guarantee!)
The upper tracks are in green, the lower ones, normally invisible, in pink. Some not very visible components are in blue.
I tried to deduce, as for the BB 12061 Trix, the tracks to be cut and connected to separately control the red lights. I was left to burn a Lenz Silver decoder that, luckily, Lenz gracefully replaced. Vielen Dank!