Where is the oil pressure sensor?

[126redbomb]

Hello folks!  I have been mooching about my bis and there has been a cable dangling at the back of the car ever since I bought the car.  Looking at the wiring diagram I think its the cable to the oil pressure sensor, but my problem is WHERE is this sensor(I know it somewhere on the engine but like I say WHERE) .  Iv'e looked in the manuals and can't find it(I am blind as a bat).  Someone must have had a problem with it before me and just thought stuffit and cut it off.
Any idea's?  Yes I'm thick! and havn't got a clue.

[KAL SPL]

This help ?

[stuey]

his is a bis- its the small black boot toward the bottom of the engine seen below the alternator pulley belt in this pic-

[126redbomb]

Thanks folks. At least I know where to look on both the BIS and Aircooled now. What would I do without this site.
Brilliant Thanks.
Oh PS that engine looks soooooo nice, it looks brand new.