Leo,
I found a few photos; some are my own, others from the Internet...hope this will help.
Picture 1 shows the lower mounting point of an Internet Restoration
Picture 2 shows the same mounting point on the car I'm currently restoring; my cover was torn away but some material is still under the nut
Picture 3 is where I believe the upper mounting point is but am not 100% certain...I couldn't find any photos that are definitive
Picture 4, again from the Internet, shows the inside of the cover and the 2 mounting points
Picture 5, from the Internet, shows the upper mounting point, which I believe is what I've shown in picture 3 and if you look closely, you can see part of the cover behind the wiring
Ray