2 isolation transformers 4 inverters split phase

Im having a hard time understanding where to connect the neutrals for split phase and what happens when the inverters internal relay connects thr ground and neutrals. I have split phase 240 shore power. I have a 3600w I.T. on each leg. Then I have a blue sea Blue Sea Systems, 8498, AC 3 Sources breaker panel. Then I have 2 sets of 2 24/3000/70s in parallel and series each set already feeds 2 separate 120vac panels. I want to add a 240vac appliance so I want to configure them for split pphase.please help?

Morning,

could you make a sketch? I think it’ll be easier to help then.
Thanks