H1B - Advice on Document

Hello All,

I have my H1-B interview scheduled the next week and have a query on the documents needed. I will be working within my company itself and hence dont have a client letter as such.
In the RFE petition, my company has included the JD for the role there. I dont have any more supporting docs ? Will this suffice ? Do I need more ?Do I need atleast an internal SOW ?

Any help will be greatly appreciated.

Thanks,

Satish