How to MultiPlayer with JurassiCraft Mod?

Hi all,
My family just started playing Minecraft here at Aternos and we would like to be able to play in the JurassiCraft mod but we don't know how to get it to work on a server here. Can anyone give us directions for getting JurassiCraft to work on the servers here at Aternos, please?

Thank you....

That may just work... thank you so much for the info. At least I now have a direction to follow... sure do appreciate it!