A bit of an old photo, this was my #1 for a couple years, extensively modded SE Custom 24 Floyd. The Floyd has since been replaced with a Gotoh GE1996T.
I added the switches, yes. There was plenty of room in the cavity for them, I just had to drill the holes. There are sort of two versions of the Custom 24, those with blade switches and those with toggle switches, for their pickup selectors. This type of switch configuration is typical for 24-08s with blade switches, there just isn't quite as much space between the tone knob and pickup selector with these Floyd Rose SE models, so it's a bit more cramped.