The 7-pin round connector as used on semi trucks & other farm equipment are the same. Emphasis on ROUND connector.

The  7 pin flat spade type connector normally used on RV equipment is not the same as the farm tractors, though they're popping up in more places. Personally, I'm not sure why the RV industry or the pickup truck industry, or whoever started it....decided to design something different than the milllions of semi-trucks & trailers that are out there & have been using 7pin rounds for centuries now.

Shoup Parts has the 7 pin round that will marry up to your tractor#mce_temp_url#. Theirs is a good quality connector. Some of the Amazon items are not as rugged.