It's very simple. Here's the La Bella bass string length guide:
(should you find the font offensive...they put up another one, otherwise identical
https://www.labella.com/wp-content/uploads/2016/03/La-Bella-Strings-Bass-String-Guide-2-1.pdf )
As you can see, winding length for their short-scale strings is 32 ¼”. Does this measurement fall in between the ballend-to-nut and the ballend-to-tuner distances on your bass,
if you top-load ( = if you
don't install the strings through the body)? Are you willing to topload?
If the answer to both questions is yes, then follow Mark's advice and get the 760N-S.
If the answer to either or both questions is no, get the 760N-M.
Its winding length, also per the guide, is 34 ¼”.
Would this be too long (exceed the ballend-to-tuner distance, when going through the body)? I don't believe so.
[If I'm wrong. and distance the ball-end to low E tuning post is less than 34.25", some full-gauge portion of the low-E string will end up on the tuning post, which La Bella advise against happening, but
1) it can be a deal with flatwounds and low B strings, seldom so for roundwound E strings (which this one is under the tape), let alone thinner strings
2) the -M set would still be the closest fit, again assuming you don't want to topload, and/or if the -S set fits at all in case you do.]