Bones are created at center of mesh when importing to Roblox

Hi, I’m working on a train system in Roblox and currently I’m working on making a bellow/gangway (The rubbery bouncy thing in between 2 carriages) and I’m following the instructions from this tutorial I found (https://www.youtube.com/watch?v=h9TEMizHfSE), but when I import it into Roblox Studio from blender the bones spawn into the center of the bellow.

Current results

Expected results

Bone setup in blender

Any help is appreciated!

Bump bump, can anyone help me please? Its been 12 hours since this post and still no replies