$6.49 each. We have eight battery positions; we need 16 of these little fittings. Woo boy.
So off to the internet for a quick reality check. And in today's world, with everything at your (and Google's) fingertips, the real trick is knowing what to search for. You have to know what your gizmo is called, and probably at least one alternate name. Its really hard if you don't have this as a starting point.
As it happens, I recognized these as the fittings that were used on carriages as anchors for strapping to hold down the luggage, thus the name. A look on eBay found them for $1.15 each in lots of 10. So I bought 2 lots, for a total of $23 plus $3 shipping. And I have spares.
Now another problem appears... If I mount them on the bulkhead below the cover plates, they will be below the tops of the batteries. They certainly would wear or punch a hole in the battery sidewalls as vibration took its toll.
So I once again hit the internet, this time to an old familiar place: Online Metals. I ordered a square foot of 3/4 inch "cutting board" (HDPE), and sawed off a couple of strips a little thicker than the footman's loops were tall. With suitable counterbored screw holes and screws, these were mounted on either side of the footman's loops, providing a large, relatively soft riding surface for the batteries.
|Batteries strapped down|
Now the project is really, truly over.