RFE Case :- Client got changed from X to Y. Different cities within same state

My petition got picked in lottery and now it has gone into RFE.However, my client got changed during this entire course.My current client and the client which i have mentioned on my petition are in the same state but different cities.For responding to the RFE with relevant docuemnts: USCIS is asking for a Project contract or SLA. Will a Contract from current client will do or do i need to submit any other document as well?? Pls help.

Please respond immediately as i need to respond to RFE.