I printed this using PETG at .15 layer height. Use 10 PC4-M6 fittings.
Connect PTFE tubing from the fittings to the MMU.
I recommend using some printed combs to help align and keep the tubing in place. Not necessary but very helpful.
When installing the printed part with the fittings, please note that the PC4-M6 need to be oriented so that the flat parts are facing up and down on the 5 fittings passing through the handle. It is a fairly tight fit and if the fittings are not facing the correct way, it will be very difficult to get everything to fit properly.
The author remixed this model.