The gearbox has an extra bit on the back and is slightly longer, the switch can be on the gearstick but is normally sticking out of the dash. Have a look through the last couple of pages of 'Back of the Gargage' to see one in place.
The Smurf (formerly known as Smurfette)
http://66.129.69.181/forum/topic.asp?TOPIC_ID=2280&SearchTerms=smurfette
'Harvey the RV'
The Smurf (formerly known as Smurfette)
http://66.129.69.181/forum/topic.asp?TOPIC_ID=2280&SearchTerms=smurfette
'Harvey the RV'