You are correct, I could easily power up the number plate light by Scotch locking a new 2 way connector to the wiring feeding the brake/tail light.
Ideally I do not want to mess with the bike wiring looms (Scotch locks etc), that is why I thought it would be easier to install a proper permanent fix, consisting of;
Building a cable (wiring loom) that plugs into the bike loom (as per the secondary loom that comes with the bike 777.11.081.100 ) with the Molex connector, permanently route that cable through the bike, to end with a 2 way cable connector close to the number plate.
The original number plate light will be fixed on a legal sized number plate.
Attach that plate to the bike, plug in the number plate to the newly installed 2 way cable end, pass the MOT Test. Remove the legal number plate, protect the 2 way connector open end and reinstall the illegal number plate.
Always carry the legal plate with me and if Plod plays up. install the plate, there and then and away we go.
So if you have a couple of the correct Molex plugs (as in my photograph), with cables attached, that would be super. I can purchase the 2 way number plate connectors online and with your 2 Molex connectors, I could make up my own wring loom, that plugs into the bike loom and then powers up the number plate light only.
I would like 2 Molex connectors, as I would like to do the GF's bike, in the same way.