A slight modification to a very nice designed drag chain at https://github.com/Tigra-Astronomy/ERCF-drag-chain that simply has a slit in one side just wide enough to pass a single wire through to allow threading whilst retaining any connectors.

Original design already has snapaway supports in place. This mod did however need me to print with additional supports, since it broke one of the bridges. I'd recommend printing using a support interface if possible.

I printed in petg (with pla interface), and was very happy with the results.

After importing the stl/step file, use ‘split body’ to split into two ends and joint. The ends need rotating to get correct support orientation.

See original design for further printing suggestions.