Bonding options for jboxes

I’ve got two sets of 4/0 aluminum (2/0 ground) service wires heading to from a 400amp dual meter pedestal to 2 200amp load centers.

Questions Anyone have preferred method for bonding in a jbox in this situation? I’ll be using insulated wire connectors in the larger jbox to make the splices.

Long story short. I had to upgrade from 200 to 400amps after I roughed in the smaller jbox. Added the larger jbox to have enough room for everything. There will be no splices of the wires in the small jbox, just bending them down to the larger jbox. Do I still need to bond that jbox if that’s the case?

I’ve got two sets of 4/0 aluminum (2/0 ground) service wires heading to from a 400amp dual meter pedestal to 2 200amp load centers.

Questions Anyone have preferred method for bonding in a jbox in this situation? I’ll be using insulated wire connectors in the larger jbox to make the splices.

Long story short. I had to upgrade from 200 to 400amps after I roughed in the smaller jbox. Added the larger jbox to have enough room for everything. There will be no splices of the wires in the small jbox, just bending them down to the larger jbox. Do I still need to bond that jbox if that’s the case?