Lol ahhh ok I just saw in the OP that you said you were getting the herpstat proMy bad!
It's really easy (IMO) to wire up flexwatt individually, but I am an electrical engineer and I have access at work to soldering stations and wire galore so that might be why it's easier for me. But there is a really good DIY article here on how to wire it up. I did mine exactly the way that he does his soldered flexwatt and it works perfectly on my corn rack. Just make sure that you put something over the exposed metal. I got zapped once by it and let me tell you that was NOT fun!