I own a Dell OptiPlex 7010 thats has 4 Sata connectors, but they're not labeled so I don't know which are Sata 2 or Sata 3... Does anybody know or have found documents saying which is which?

I already have found:

https://downloads.dell.com/manuals/all-products/esuprt_desktop/esuprt_optiplex_desktop/optiplex-7010_owner%27s%20manual4_en-us.pdf

https://www.dell.com/downloads/global/products/optix/en/optiplex_7010_technical_guidebook.pdf

All I found out from these are that I have 2x Sata 2 Connectors and 2x Sata 3 Connectors nothing else like layout which I really need.