The service entrance conductors end at the service equipment per the definition. The service equipment is the service disconnecting means. The conductors from the taps to the 350's to the service equipment are the service entrance conductors. The six disconencts are permitted at the end of each set of service entrance conductors. There is nothing that says the SE conductors have to be continious between the 350s and the service disconnect. In this case they pass through the meter.
As far as the #6 GEC, 250-66(a) never requires a GEC larger than #6 to a ground rod no matter how big the service is.
Don(resqcapt19)
