I modeled this thermometer spool when the ones I bought didn't come with one, despite it being shown on the box! Wasn't happy with the ones that have the probe exposed.

https://www.amazon.ca/BFOUR-Wireless-Bluetooth-Thermometer-Grilling/dp/B08C1YQ49D

While it's made for this particular BFOUR thermometer, (12mm diameter, 142.5mm long, not including the little 3.3mm screw at the top) I'm sure it can be sliced and/or resized for other probes or cables.

The lead is 106cm including the plug (8mm), and is meant to wind clockwise. The plug slides in from the top with only a bit of resistance.

A thin bead of CA or plastic model glue will do, and the tolerance between the pieces should be enough for most printers.

Print Settings

Rafts: 

No

Supports:

No

Resolution: 

0.2mm

Infill:

Any

Filament:

Any