Anyone know where sending unit would be for electric fuel pressure gauges would be on engines both gauges are not working can't see both engines having same issue thanks

I looked there didn't see it both engines have there own gouge and neither one registers anything I checked it manually while running on river and it has the fuel pressure the gauges are electric

Well I found problem with pressure gauges both sending units were bad easy fix and just a FYI if any one has a 98 29 outlaw and are changing mechanical trim indicator cables one is 21 feet and the other is 23 feet and putting the gauge back together sucks!!!!!!