Frank,
Sorry for the delay in getting back to you, but please find below the location and the styrene locator that positions the tool box in the boot of the Beta Saloon (S2).
Just to give the pictures a sense of perspective, this is on the passenger side just behind the rear light cluster. You can just see the boot lid rubber seal.
I have pulled back the rubber boot mat.
If you require anymore information please let me know.
Kind regards.