My '47 uses the rear cross member to secure the spare in the carrier. It's directly above the rear spring shackles. Here's a few pics that I've acquired for your reference.
Attachments
Spare Tire Carrier Complete.jpg (25.15 KB, 158 downloads)
1940 -1950 Spare tire carrier.jpg (92.79 KB, 168 downloads)
46-spare-tire-carrier-010.jpg (269.25 KB, 136 downloads)

Last edited by HandyAndy; 06/16/2020 6:50 PM.

Andy

His: 1947 Chevrolet 3104
Hers: 2008 American Saddlebred

"I proudly Stand for the Flag and Kneel for the Cross" Unknown