Does anyone know what size nut fits the auxiliary threaded post on the battery negative cable? That's an ideal place to mount a Battery Tender pigtail, but I don't know if it's 10mm 1.5 or something else. I really don't want to do a tyrial and error to find the right fit. Thanks.

 

10mm would be the socket used on this nut, not the thread size. The stud thread is M6x1.0.

James