Speed Twin Ignition Parts

Can't help with your parts question, but I'm interested in what happened to the bike before you bought it?

 

Good luck getting it back together. Once done you will have a great bike

 

The white bit that’s circled would fit upside down under what’s left of the ignition barrel, the other bit that’s circled. It has the contacts that are made when the key is turned, lighting up the dash, priming the fuel pump etc. It’s obviously been smashed in the impact along with the instruments and you are going to need new parts to get the bike running. Seen many an ignition barrel like that in the 90’s, it was the favoured method of stealing cars*, pop a rear quarter light, break the plastics from round the steering column then scaff pole the barrel allowing a screwdriver to do what the key did previously.
*Disclaimer* I did not steal cars in the 90’s, I was one of the “good guys”
Good luck with the project.

 

I've just taken some photos of my front end with the steering lock on. Bit of a jumble in there but you might be able to work out some of it.
Here's a couple from the left...

 

And a couple from the right and below...

Most of the wires feed into the back of the headlight. Not had a look in there.