Alternative OD switch location

[tsouthworth@att.net]

.I'd like to appeal to the list for some help.  I need to 
wire up the OD on my 70 B.  The column mounted switch is 
kaput and I'd just as soon move it to a flip switch 
mounted near the radio.  
Originally there was no OD in this car so no wiring 
exists.  What are the basics for connecting the overdrive 
unit to a dash mounted on/off switch?  I'd especially 
like 
to avoid those shocks I was reading about.
Any help would be appreciated.

Thanks,
Tuck Southworth