Peter, et al;
There IS a limiting factor in the current drawn in charging a battery, and how much it can supply also.
Basically, the current drawn by the battery will be a function of the difference between the charging voltage minus the existing battery voltage divided by the Internal Resistance of the battery - excluding voltage drops in the cables, as you mentioned.
When new, an SLA battery has a lower Internal Resistance and this increases as the battery gets older and used up.
Internal Resistance of the battery is somewhat predictable by using a High Discharge Battery Tester!
I have a 100 Amp tester that, when discharging the battery for about 10 seconds at that amount, shows the Status of the battery as a function of Weak all the way to Good! What it is actually doing is measuring the voltage across the fixed resistance, a function of the Internal Resistance!
A regular size 24 Canadian Tire Marine Deep Cycle battery shouldn't give excessive current draw when charging in my application, but a depleted new AGM battery, with it's VERY LOW internal resistance would probably melt fuses and cables!
I just replaced mine and will keep an eye on it when charging after it's been depleted! As mentioned, I can use my Charge Wizard controller to drop the charge voltage to 13.6 or 13.2, if 14.4 gets too warm.
This advice and explanations are my own, after doing some research, and may NOT accurately reflect the total physics or reality of what does happen! Like ALL Internet advice, use your own judgement as to it's validity!
Now for some more camping!