Where is my converter?

Does that 4x8x8 box say intellitec on it? Although those dimensions are a tad big I am assuming they are a guesstimate. If it is your converter then it will have a large gauge black and red cables going to it as well as another AC 120 volt cord that plugs into a receptacle. In my experience at least half of the Pace arrows and Southwinds I have dealt with are located under the fridge. Many others were located in the bedroom behind a drawer under the wardrobe closet. Pull out the drawers and start looking. It will be close to the distribution centre. I have installed an inverter or two in units of that configuration. Good luck and get back to us.