[Shaleradio]

I have a 41-220C and unfortunately my candohm reads are off.  I've never worked with a candohm before and I need some help.  My goal is to replace this with a terminal strip and wire the replacement resistors in series.  I assume the side that will go to chassis ground is on the 53 ohm side which is the plug side.  Please let me know if that is incorrect.
My real help is needed in my candohm math for wattage.  I have the ohm values as one given but when I assume to plug in another given, under my ohm's law equations, I get crazy wattages.  I would like to be able to figure these on my own in the future but I'm not that advanced yet to get this.  Thanks in advance,
Mark