It doesn't really matter, you will just need to code it correctly.
I made the mistake of soldering up one of my float switches backwards, and had to code it opposite of the norm.
Normally it would read (Using 2 float switches for an ATO outlet):
Fallback OFF
Set OFF
If Sw1 CLOSED Then ON
If Sw2 CLOSED Then OFF
I wired switch 2 backwards, and had to code it:
Fallback OFF
Set OFF
If Sw1 CLOSED Then ON
If Sw2 OPEN Then OFF
The key it to check before soldering by using a basic household lamp(It will turn on and off using the outlet your coding) to make sure you have it wired/coded correctly.