Just guessing but 12S ?
Means charge at 41.40 - 41.45V just stop, no absorb or float.
Resting at 3.3-3.4V gives you nominal 40
Should be able to use for 36V applications, ~38.4V under load most of the way down
I would set that as a resting stop limit at the bottom, hard limit of 35.90V under load.
Yes sacrifice some capacity, but get lots more cycle lifetime, these will likely be pretty close to EOL if residual capacity is already down 20%.
But note that each cell is worth what $9 when new?
Can the fittings be reused with new cells when the time comes?