openSUSE Linux JeOS - Vmware/Xen/Hyper-V customization

Hello team,

I need expert advices regarding to building an opensuse JeOS distro for vmware/hyper-v/xen environments for a custom software.

Basically i see that there are vmware/hyper-v/xen images for opensuse leap 15.2 JeOs at https://software.opensuse.org/distributions/leap address.

I would like to edit these images just to add a custom repository as well as to add some RPM dependency packages.

Honestly, i need to learn what is the best way to modify these images in a straight forward manner - i do not want to build whole images from stracth just to edit a few repository lines and to add some RPMs.

Please guide me about how to achive this goal - if there is a how-to-guide etc. would be best.

Thank you for your helps.