Relay Rewiring.......

I bought a relay online a little while ago tonight and just took a look at it tonight, because I wanted to switch my babies from my flouros to my hps. It is an HMR1 relay unit. I didn't realize when bought it that it's supposed to be used with the harvest master climate control station. It came with an RCA cord that goes from the main station (which I don't have, and don't intend on buying) to the relay itself. I was wondering if anyone has dealt with a simillar dilema before, or just get some tips from some of you electronic gurus out there. I've browsed around the forum, but I couldn't find anything but a relay switch mentioned in passing. Anyways thanks ahead of time. Hopefully I'll wake up to some responses in the AM.