The controller "knows" its drives
If you had swap them, likely, it has happen nothing "automatically"
Anything that could had happen, it has ONLY if you forced some process through the RAID control panel (in the controller' BIOS)
When I'm talking about having backup/imaged the drives, please re read above

, I mean
" have you create the images of, or cloned, the single drives when this issue has begun"?
Which mean: those drives (if have not got disrupted by some process forced by yourself) are the unique copies of your valuable data:
BEFORE to "play" with them (either simply moving the around desks, plug unplug from the data recovery workstation), you must save your bo**om creating their copy (this is the first step we do during RAID data recovery operations at RecuperoDatiRAIDFAstec). Prevent is better since Things may go wrong.
Sa stated above, next the images/clones will be used to reassemble them
- destripe them (with R-Studio this process is dynamic)
- dump the entire storage (again dynamic with R-TT)
- find the filesystem
- locate requested directories
P.S. How many are HDDs? Which capacity?
Unless there is no corruption in the single HDDs content, thing may be done with the R-TT support (hopefully) otherwise must be done manually. Which realistically mean to forward to us or similar specialists the disks set, since we (you understand) cannot divulge our knowledge.
Though, on the R-TT website is written a guide on how to find disk order and hopefully get the RAID assembled.
But don't forget to avoid playing with the originals or to take care so much of them
Cor