The spring and washer are shown in ORD 9 SNL G-740, page 50, items 'E' (washer) and 'G' (spring). They fit inside the cross tube, 'H' (described as 'lever') in the end that pivots on the ball stud, 'D', which is attached to the transfer case. Now you have what it is, and where it goes, including which end.
I have done a few of these. I learned to drive at age 10 in a 1947 CJ2a, bought a CJ6 when I was 18, an M170 when I was 25, a CJ3b when I was 30, and an M38 when I was 38. I am now 52, a retired mechanic (for medical reasons, my legs hurt too much to do it every day any more) have always done my own work, and still do. I've seen a few of these over the years, Willy's was nice in that once they had something that worked well, they kept building it the same way forever, thus we have huge parts interchangeability over a span of 40+ years on some parts.