SSM connector location ?

[ShaneHobson]

I have bought an Evoscan two headed cable for my '91 JDM, loaded up the software onto my MacBook Air running Bootcamp & Windows 7 Home.

After spending about 1/2 an hour on my back with my head in my drivers side footwell with a torch I can't find anything to plug into.

Can someone smarter than me please offer some pointers as to where I can find the diagnostic connector ?

Colour ?
Location ?
Does it need to be unplugged from something or is it hanging loose ?

Thanks, Shane