First we need to connect on user apacheofbiz on Bintray: https://bintray.com/apacheofbiz/ (This account is availble only by PMC)
On this account you have the package GradleWrapper / org.gradle.wrapper
Load new version
To Load a new version, declare your version
Set as minimal the name (like V5.0.0) and the official release date from gradle community https://github.com/gradle/gradle/
Upload
After, click to Upload link, hidden on the header bar
Set the version patch to help the init script and drap'n'drop files: gradlew, gradlew.bat, gradle/wrapper/gradle-wrapper.jar and gradle/wrapper/gradle-wrapper.properties from your OFBiz release candidate
Publish
In final, you have all your files present on the file list with a green dot. Click to Publish link to terminate this upload operation
