Make a pigtail to go on the battery post, then connect your extra wires to it rather than the battery post.
Why create a sodding problem when all you need is to be smarter than the machine.
An alternative is to crimp 2 wires per terminal.
Personally, I appreciate the fact that Ducati engineered the battery location below the CG. They could have taken the easy way and put it under the seat, above the CG.
BTW, you actually do not need to remove the battery to access the post. Just say to yourself, I'm smarter than this machine.....over and over until it sinks in.