I'm sure it's pretty obvious, but just in case someone pops in and doesn't quite understand.
Also going to add on...
If one of these new animals does seem to become ill, you would want to reset the quarantine clock on all of them. Don't count the days and move the ones that still seem healthy out to where they may become ill later and infect your healthy collection.
If this DOES become the case, I would also consider moving the ill snake to another habitat/sick cage/area of the household for treatment so as not to actually infect the others in the rack.
At least this is how I've always run and have thankfully never had issues with it.