You can upload a cartridge, but not directly. It needs to be packaged as part of an add-on if you want to user this dialog
It is possible to create an Add-On with a Cartridge; however, on Jive you must be an admin to approve the Cartridge. If you have one you'd like to test, we can try to work with you to approve this when you publish; however, it poses a problem to iterate while developing as we will need to approve each time an add-on is re-installed.
If you are simply developing a cartridge by itself you will need admin rights to a sandbox to do so. Since you are a partner, we can discuss leveraging a different sandbox for this development/iterative process where we can make you an admin. I'm following you now, so please reach out via DM or the Partner community and we can discuss details there.
Thanks so much for your prompt response
As of now, we do have a tle instance with us to try on the development part. Do we need further info about the sandbox, we would reach out to you.