Shift+Click (on outlet) = connect one outlet to multiple inlets
Ctrl+Shift+Click (on inlet) = connect one inlet to multiple outlets
Very useful time saving stuff! Although that’s the fastest short-cut that I know of; it will still take a while with 50 objects. There may be something in the max toolbox (I think it’s called that) that could help with this. Someone who knows will chime in!
for a 50 to 50 connection you could work with dummies:
have custom abstractions with 50 in- and outlets in your path,
and an example patch with them where you once connected
now when you need two objects being connected the same way,
copy and paste your empty example and rename the objects.