If he has a title, buy it. The missing parts are pretty available and loads of those bikes about
+1
If you don't buy it I will!!!!! That is a restoration candidate though, looks very nice. I have a '72 in those colors, until a fire broke out next to it at a shop. Now its burnt and rusty.... Soon to be known as project "Kemuri"
Also, that brown wire would hook into a European Front Parking light, which you probably do not have on your Headlight bucket. So it does not attach to anything. You can check to see if the power switched on when the Key is in the Parking Position.
Gersh