Working out the safe continuous discharge current for a lead acid battery
Lead acid batteries in cars do not need a CC limit but do have a CV limit as in cars. 14.2 for flooded cells.

Follow the link on the page you gave for maintenance tips.

the C20 rate is 95Ah in 20 h so a few A will last 95Ah/few A=__ h

https://www.tayna.co.uk/tutorials/caring-for-your-battery