I just googled that cover. looks exactly the same as mine. Same pull cable and everything to release it. I like how flat they site and lock once the tailgate is close and you can not get into it.
Maybe there is a mod on the forums or the interweb for it. Could just tie into the DRL and have them come on with them. or maybe wire them to come on with markers? Are you lights auto?
I had lights similar for my Tacoma. I just wired mine into the marker lights when i turn the light switch one turn. Was pretty easy to do so.