likely
If it is in regard a recent assessment then you do not to use a SAR, you can just contact the DWP office that dealt with your claim and ask for the reports.
If the reports are older then send the SAR to the office that dealt with your claim.
An MR request should be sent to the office that dealt with your claim within one month of the date of the Decision.
You can contact Maximus by both phone an email
www.chdauk.co.uk/contact-us Gordon