[doerf]

Electrically, it makes no difference on which side of the battery you put the fuse.

don't tell the high school teachers that

when you have a fuse bank it is more convenient to put it on pos side as there can be one pos line to it and ground (common) can be all over the place
if cars were developed with + being ground (common), then it would be more convenient to have fuse bank in - side
but in main line right off battery it doesn't matter
could even put a fuse on both + and -, that would add a bit more protection as which one blew would depend on which one, a short was closer to

almost ready to start the slow process of getting my car back together
my frame connectors, 4 link and now minitubs are done and all underneath primed

electrically I will probably put a fuse at battery on both sides and have alot more ground straps
edit...and too add I'll use lots of relays

 

[doerf]

Relays don't protect against overloads and shorts. Neither do cut off switches.

don't know that anyone said they did
relays mean you don't need high current/big wires going to switches

All a second fuse does is add more resistance to every circuit at the battery connections (not good)

fuses shouldn't be adding resistance

No added protection. The current out of the positive terminal of the battery is the same as the current into the negative terminal of the battery

technically yes, especially if considering just steady state with battery and resistance, but strange things can happen with circuits with capacitance and inductance and cars are filled with both especially with modern electronics, unpredictable instantaneous currents and voltages can happen with shorts in complex electronic
I'm putting fuses on both sides and lots of relays

 

[doerf]

fuses are to protect everything in the circuit from over current and thus heat and yes burning wires and insulators is a part of what fuses protect

I did not say wires have capacitance and inductance, but the overall car circuit has many components with capacitance and inductance