TWRP cannot find backup
Thanks to you both, but it is fixed. I removed the SD card and copied the 2-backup files to the Root of it and put it back in. I was connected via USB to the phone so I copied the 2-backup files to a bunch of different Folders within the Internal Memory to try and see where TWRP was looking by defualt.
Slapping my forehead moment now!
Straight off, Internal memory, Recovery Folder and TWRP found them there without any Navigation. Did not think of that earlier but patently obvious now. Dang hindsight -- again.