I managed to remove the original ignition lock so that I can use the same key for the new fuel tank lid and the ignition switch. Instead of drilling out the old security bolts, I used a hammer and a nail/centre punch to "turn" the top of the bolt to loosen it. If you're patient with it for a minute or two more and use more love taps the bolt then becomes loose and you can use your fingers to remove bolt.
But, now the plug that is on the new switch is different to the old one that I unplugged.


I'm thinking this. Push out the 3 spade connectors in the original harness. Do the same on the new plug/harness. Then change that bullet connector on the new switch to a spade connector. Then insert all 3 spades connectors in the correct order into the old plug.
I'll also use a multimeter to check continuity at different switch positions on the old switch, then make sure that same pins work on the new.
Would this work? Can't see why not.