Power Supply Converter Cable for Xbox 360 to Xbox 360 E

I bought one similar and it didn't fit my 360e. The end that plugs into the 360 power supply box didn't fit at all... it had a different type of plug and shape... it wasn't square. There is no way to look in the end of this plug to see if it has the same as the one I bought from a different company. I need a replacement plug/ power supply for a used 360e console only that I bought. I have a 360 now. I bought a replacement power supply and it was missing the ground prong... it had two prongs, not three and the connection was very loose... so I sent it back!! I don't want to keep sending things back and seeing inside of the plugs would help. How can a square plug fit into an odd shaped, slightly raised on 3/4 of one of the four sides plug? It actually appears to have 6 sides with the slight elevation making one flat side into three parts... left side, arch, flat top, arch, right side, bottom. If you can understand that image in your head of the plug I need to fit in my xbox 360 power supply, lol!! SMH.... There is no way to attach an image of the type of end I need either. I guess it is time to send the xbox360e, console only, xbox 360e I bought back too!! Exasperated in Florida.... 😫