If it's a sea water toilet, it draws 15a...unless it it's one of those gawdawful 29020 "conversions." If it is, it draws 24 amps, will choke on just about anything except liquids, and makes enough noise
to wake the dead.
If that's not enough to convince you to return it...no matter what make/model electric
toilet, it should be on its on dedicated circuit, with its own breaker, shared by nothing else...'cuz anything else on the same circuit that's on at the same time will reduce the power to both the toilet and whatever that is...and low voltage to electric motors is the best way to send 'em to an early grave.
READ--and FOLLOW!--THE INSTALLATION
INSTRUCTIONS! If you don't have 'em, google
your model and download 'em from the Jabsco site. If you don't understand something, ask questions instead of guessing...'cuz it's always cheaper and easier to do it right the first time than it is to do it over.
HOp, I dunno whether today's pump lines up with the holes on the BB base or not...but the right drill bit in a hand that knows how to use a power drill can solve that problem.