Regarding this, how do you trigger the Minutemen ending?
Use the terminal conveniently located, and load the Institute Relay Targeting Sequence Holotape onto it. Start the sequence, and your friends can teleport inside the complex. Now, speak to Preston Garvey. Load this holotape to let the Minutemen into the Institute to fight with you.
Furthermore, where is synth Shaun after Minutemen ending? Talk to Preston Garvey and wait until you are teleported to a new room. There you will find the previously met synthetic Shaun. You can decide to leave the synth here or (a better idea) take him with you (after completing this quest he will reside in the Castle or in the Sanctuary).
Additionally, what happens if you side with Minutemen?
However, if you choose to side with the Minutemen after completing Act II, you will become allied with the Railroad faction, forcing you to take up arms against both the Institute and the Brotherhood of Steel. Siding with the Minutemen means taking up arms against the Institute and Brotherhood of Steel.
Can Minutemen and institute work together?
If you join the Minutemen you'll end up allied with the Railroad and will end up destroying the Brotherhood of Steel and the Institute. If you join the Institute you'll be allied with the Minutemen and destroy the Railroad and the Brotherhood of Steel.
