Work Experience Question

This is with regards to assessment. (ACS).

I have total of 14 years work experience of which I have about 6 years experience in Infosys India. I have gone onsite twice for two different projects from Infosys. One project was about 8 months and other project was about 6 months.

The question is do I have to show this experience while submitting my application for assessment or show reference letter given by Infosys Company which doesn't have the Onsite experience details because Infosys is not giving any Reference letter for my onsite projects, I will not be able to show the onsite experience.

If I have to show my onsite experience (8 months and 6 month) then how do I go about doing it?

Let me know!

Thanks!