There are quite a few variations of 4100s, so it would help to know exactly which variant you are interested in. I'm not sure if the becket ends are all the same, due to the fact that I am not sure if there are different diameter ropes used on any of the variants. Length wise, there are many different options depending on how the shovel is set up, and which variant it is.
I did a set of hoist ropes on a 4100TS today in fact, and I can say that the beckets on 4100TS, BOSS, and C BOSS are all the same size, but can be different lengths. The length will vary depending on whether the shovel has an equalizer, or straight bail bar connection for the ropes.
I can't think of the exact dimensions right now, but I will look tomorrow night when I start night shift. Is there anything in particular you want to know?