There's got to be a factory location for the triangle. I looked where the MK V Jetta sedans mount theirs... under the rear seat cushions. That's not it.
I looked at the VW.de website and downloaded the product brochures. No luck there. I thought I'd see a photo of one mounted up...
In my MK V JSW, I put the triangle in the driver's side compartment in the trunk. There's something like a cut out for the triangle there, but it doesn't snap in like it does in the Golf storage tray.














