Reference Frames

There's a few ways to do this. What I would do:
1. Open the .fit image in SGP (File/Open Image)
2. Left click anywhere in the image, choose "Plate Solve"
3. Plates solve the image using your default plate solver, or blind solve.
4. When the solve completes a dialog window will pop up. Make sure to
tick "Use these results as the reference image for target". This will
populate the target coordinates etc. into the target settings.