Well, if you really want to do it manually, you'll need to get all the latest JAR files (the ones with the newest biggest version numbers) from these directories:
https://oss.sonatype.org/content/repositories/snapshots/org/bytedeco/opencv/4.5.5-1.5.8-SNAPSHOT/
https://oss.sonatype.org/content/repositories/snapshots/org/bytedeco/openblas/0.3.20-1.5.8-SNAPSHOT/
https://oss.sonatype.org/content/repositories/snapshots/org/bytedeco/javacpp/1.5.8-SNAPSHOT/

OMG, there are a lot of them ;-)
But in the official release, there will be option to download it manually, as usual, from

https://github.com/bytedeco/javacpp
https://github.com/bytedeco/javacv/

is not?
Do you have any idea when the official release will be out?

P.S. otherwise, what you are doing is truly extraordinary, and deserves every possible praise, I honestly think so !

These new wrappers have been released with version 1.5.8! Thanks for reporting

Hi, thanks for the tip!

These new wrappers have been released with version 1.5.8! Thanks for reporting

with 1.5.8 or 1.5.9?
And what is maven content now?
For snapshot , this was
http://bytedeco.org/builds/

What do you want to know exactly? They are not going to get removed from 1.5.9, if that's what you're asking.