Brake Bleeding

I’m getting ready to do a brake flush on my 1974 246GTS. Never had a car with two brake reservoirs and I assumed one was for the front brakes and one was for the rear brakes. After consulting factory workshop manual it was really unclear so I assume both reservoirs feed all 4 brakes? I had assumed one was for the front brakes and one was for the rear brakes. I plan on doing a gravity bleed as I have plenty of time. However the work shop manual says start with the front brakes first. (Picture below). I was taught to start with one farthest away. I would appreciate any comments point me in the right direction. Thanks for any help!
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Thank you for your reply. I started with the front brakes this morning. Order of bleed was driver then passenger. I was gravity bleeding the system. Everything went well and took about 25 minutes per wheel. Still have good hard pedal! The attached picture shows the two reservoirs and which brakes they feed.
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I did find this diagram from years ago. I think it was originally in color.
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