Yup...cheapo jabsco works fine and no problems. Change all your old hoses while your at it. Just make sure you put a vented loop in the intake line as there is no check valve going to the toilet.
A previous owner replace the original potty with another pump version at a crazy offset angle. There fore there is one or two screw holes exposed, but I dont know if that will be the same in your case. Anyway. You don't see it when standing (or seated for that matter).
Wired directly and fused inline to the 12volt bus in the main panel.