While, conducting an experiment to access an aspect of electrochemical cells, I designed a means of controlling electrode and salt bridge placement. The experiment used a Corning Pyrex 50mL beaker to hold the electrolyte solution and Flinn Scientific metal strips as the electrodes. These electrodes are held onto the designed covers with M3 screws. I recommend conducting research to find what material the design should be printed with, but I printed the model in PETG for my sulfate based electrolyte solutions.
These covers can be printed without supports.
The covers in the pictures are printed from PETG (Prusament Prusa Orange).
Supporting Materials:
The author hasn't provided the model origin yet.