i think it could helpful if i plateSolve a Photo (RA, DEC and Angle), maybe from the last night, to put this data into the frame and mosaic wizard too and then you can fetch it.
If you want to fetch the location of a previous image you took, just open it in SGPro, right click and then solve it.
If you want MFW to use a previous image as a starting point for an MFW search or if you wish to expand a previous mosaic, simply open the image using the MFW tool and click search.