how to minimize each vehicle time in vrp with or-tools

i want minimize network time in other words: each vehicle time should be minimized as possible
1- this means force all vehicle to service locations
2- and balance number of locations serviced per vehicle
3- and minimizes the time the last vehicle will arrive to its end node
@daniel-j-h what you said about forcing all vehicle works fine but others not working at all
do you have any idea to do number 3?

The issue provides no file, test, or entry point to start from. Review the repository's Node.js bindings for OR-Tools and the existing vehicle-routing configuration, then define completion against the three stated goals: every vehicle serves locations, service counts are balanced, and the last vehicle reaches its end node as early as possible.

Written by the indexing model from the issue text.