I saw that on the brochure as well! Not in the Alpine or Tiger parts books, at least all of the editions I have... I wonder if it was like the South African built cars, or the Jag E-type which was basically windshield wiper motors with fans mounted to them! Another thing I see on the earlier brochures is a "brake" warning light... never seen one of those either.
I did finally find the Wipac reverse lamps in the parts books... As they were also used on later series V Alpines it's in the Alpine list. It does reference the switch for the Mk2 Tiger in the Alpine book as well. Nothing in the Mk2 Tiger parts list.