The P95 is an indicating fuse mount intended to tell you that something has gone wrong with the motor, and which direction that the ESC is trying to drive it, so for that job, it needs to live between ESC output and Motor. In a multi motor installation, with one per motor, it can tell you which motor circuit has given the problem.
Normally, the job of a fuse is to protect whatever is beyond the fuse from further damage, and, by implication, the wiring and anything near the wiring, like the flammable bits of the boat. To do this, it needs to be between the battery and everything else. It all depends on what job you intend the fuse, or fuses, to do. Any downstream fuses should, ideally, be of a lower value than upstream (i.e. nearer the battery) ones. That way, the one nearest the problem blows.