it is same as i stated
main 1 is load 1
main 2 is load 2
main 3 is load 3
N is common Neutral for all 3 phases.
L1 L2 L3 goes to your DB ask your solar integrator to tie up the inverter phases accordingly. FYI the Net Metering - METER is different then regular meter you please make sure for that with your service provider.