Sounds like you have a "feed-through" panel out there. Is the meter part of that panel, or mounted adjacent to it?
If that is the case, then you are dealing with "service equipment" and THAT is the place where the neutral wires are bonded to the ground. No separate equipment grounding bar is needed.
Simply connect both your neutral and ground wires to the same neutral bus, but using different holes for each wire.
If that is the case, then you are dealing with "service equipment" and THAT is the place where the neutral wires are bonded to the ground. No separate equipment grounding bar is needed.
Simply connect both your neutral and ground wires to the same neutral bus, but using different holes for each wire.