Sinkman
The way we do it is to bring the 4/0 al cable into a double 100 amp meter base. the actual set-up has three (3) actual sections the middle section is a blank cover under which is the bus for the two meter sockets the incoming cable is landed in this middle section, there are three lugs to land to.
then from each meter section No.2 seu cable is run to either a disco or a service panel.

Wm.Colt