gl1200 trunk/rear lights guard install problem

hi wingers

I've just bought a rear trunk guard
for the rear lights. I don't know how to
fit it correctly. It has little
lower brackets on it and I can't
find anywhere to fit them too! doh!

Please see the attached image!

I've searched the forum, the manual
and the web to no availe.

Any advice greatly appreciated!

Kind regards!

Angel