If you completed your Engineering in 2013, it is highly unlikely that the registration is still valid after 7 years. There is a specific maximum period of time during which you need to complete a course that you registered for. But in your case, the registration might have expired and you may have to re-register again. The credit transfer is an option once you complete the first year successfully. But for that there is a procedure which is available at: https://www.annauniv.edu/dsa/college-transfer.html . We would suggest you to reach out to dsaannauniv@gmail.com (mailto:dsaannauniv@gmail.com) about this.