I have a Honeywell/Kaz Hz-690 oil filled heater. There is a wire inside that is broken. I would like to replace the wire (and do them all while I'm at it) but I'm unsure as to how to do this. There is a square object inside the unit that the outside switch attaches to. Four wires exit this object. There are 2 small metal clasps on the object that I may be able to pry off and that *might* allow me to open the object so that I could solder in new wires. I'm afraid if I pry the object open I will break it. My questions: 1) What is this object (I have a picture but don%u2019t know how to attach it to this post %u2013 I could email it)? 2) How can I open it to solder in new wires? Thank you.