Thanks Tom and Naj,
I am still having trouble visualizing the set-up. :oops:
Tom, the "horizontal sheet metal" sounds like the radiator support extension, that has the rectangular hole in it, directly below the hole pictured in my battery tray. I can imagine a square cage nut in there, but not how the 2 horizontal bolts would fit. Also, if anything was sticking up through the hole in the tray, then it might rub through the bottom of the battery, as that sits flush on the tray.
There seems to be about a 10mm distance between the tray, and the the rectangular hole in the rad. support - is that about right, or is mine misaligned?
I will take some more detailed pics., and maybe you guys can talk me through it?
Will W14
1965 230SL 4spd
Victoria,BC