Here is a Sci-fi Fuel Hookup that can connect two other models on thingiverse. You will need to also print them. I would recommend that you Like, Collect, and Follow the models and designers.
The first model you will need to print is the Fuel Energiser Unit Legion by corvusgamesterrain https://www.thingiverse.com/thing:2896835
You will also need to print two Star Wars Legion Terrain - Rhydonium fuel canister (Rebels) by Bountyhunterxx5 https://www.thingiverse.com/thing:2932414
The Fuel Energiser and Fuel Canisters just press into place and are a snug fit. If you printer isn't dialed in, you may need to do a little lite sanding to get them to fit.