It sounds like you are well organised.
Other things you might consider, if they are available:
-Childhood photos (I had many showing stim postures, downcast eyes, odd posture, etc.)
-Childhood videos (I had some from 1970s put onto DVD and downloaded with links, showing my mannerisms)
-School report cards (Mine described an autistic personality)
-Work evaluations and assessments (Mine talked about poor eye contact, burnout, meltdowns, etc)
-Contact info for any doctors you've seen re: depression, anxiety, sleep disorders, etc.
Don't worry if you don't have access to these things; they're just suggestions. The more you can give them, the better, but overall it's the testing procedure which will be most telling.
My assessment was 10+ hours like yours. It's exhausting so rest up tomorrow. Take snacks and water and ask for breaks when you need them.
Keep in mind that it's OK to be completely yourself. I sat on the floor for most of mine. I stimmed whenever I needed to (I took my piece of satin to play with thousands of times), and don't worry about masking in any way whatsoever.
Be yourself like never before.
Good luck!
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I never give you my number, I only give you my situation.
Beatles