The creation of 45 rpm singles really had nothing to do with jukeboxes. RCA came up with the format to counter Columbia's 33 1/3 rpm format.
The 1st 45's came out in March of 1949 - the 1st 45 jukebox ( the Seeburg M100B) came out about a year later. The 1st 45 players came with
a changer so you could stack the records on top of each other. The engineers found that the records were getting damaged when dropped.To reduce the
stress and friction, they came up with the larger hole.
A lot of the 33 1/3 singles were usually in stereo and were made for jukeboxes. In 1961 RCA released singles in both 45 rpm and 33 1/3 format
and were eventually going to phase out 45's. The idea was a disaster and in 1962, the 33 1/3 format was discontinued.
Finally, I don't know why Sam made two versions of "Sugar Dumplin' ".