Originally Posted by MrWillys
My guess would be that it was some type of PTO device that was disabled, and enabled down the line. IE: Dump bed, or any other device. Willys was the workhorse of that era.
Its a rear output PTO. I have one that does both front and rear on my 47. Research it a bit over on thecj2apage.com Some of them are worth a bit of money.
On a second look, that output has speedo provisions, maybe someone was trying to make a pto out of a D20 rear output? weird