Help! TR6 ignition

Help! I am stranded at work, and my troublesome ignition switch has
finally melted, before the replacement has arrived. Does anybody have to
had the Bentley's or some other manual which tells you which terminals
in the switch are connected for which positions? All I need is the
position that it is in when driving, and the position for ignition. I
guess I can work it out by trial and error, but if anyone has the book
to hand it would be a big help.
 
Thanks!
 
Paul
74 TR6 PI