Freelance consultant working from France?

We have moved to France in the last couple of months. My husband is a qualified compliance officer, he has started working as a freelance consultant to a business group outside of France would like to register as an auto-entrepreneurE. All work is via a computer from France. Compliance is a Financial Services qualification and he provides anti money laundering advice to Trust Companies and Investment Companies. Please can you advise what code he should register under? He has issued two invoices so far and we planned to declare these on our tax return as income, but would it be better to add these invoice amounts to the auto-entrepreneur turnover, or are they not eligible as they were earned before the auto-entrepreneur was established?

His work is for a number of underlying companies within this Group and he invoices the one business group who arrange settlement on behalf of all of the other smaller companies. He issues an invoice each month, this states a sterling amount but the invoice is paid in euros to a French bank account. The companies he works for operate in sterling. Does a euro amount need to be stated on the invoice? Please can you also advise if he needs insurance? His ultimate goal is to just work as a Farmer, his work as a Consultant could overlap getting the farming business started. Could he have a second auto-entrepreneur for the farming (and if 2 auto-entrepreneur’s are possible for one person?) or does farming need to be registered differently?