The same goes here. There are folks who are very passionate about which side of
the battery to put the switch. More seem to think it should go in the positive side
but some think it absolutely should go in the negative side.
I'm a positive side kind of guy
I'm an ex-electrician and it just seems right that way to me.
Fuses are generally in the positive side of the circuit and they are
a form of switch, even tho they are a one time switch!
It will work perfectly fine either way. Just be sure the switch is ahead of
all connections. Some slides and maybe front jacks are tapped off the
battery wire pretty close to the front end. If you want the disconnect
to be total then it's gotta be the first thing in the line.