Profile question about Respondent.io

Hello, I just recently joined respondent.io but have yet to complete my linkedIn profile. At the moment i am not employed but I used to be a correctional officer a few years ago, left by choice. Anyways I don't know what i should put as my employment or what is the best way to fill up my profile so I can get the most opportunities from that website.

I know it says "most recent job title" so not sure on that. Anyone have any advice for me? Thank you!