The only way I know of right now is to highlight the RA in TSX and select "copy RA" and then paste into the target in SGP, then repeat with Dec. That is how I have always done it. It would be nice if you could just import. Given that Bisque products are often somewhat of a walled garden, I am not sure if that is even possible.
Of course one can always just import the target coordinates shown for the object, but I prefer to find a wide field image of the object on the web, match stars visually with my FOV displayed in TSX and move about to get the exact composition I want. Otherwise you can often not get the parts you really want. I almost never use the listed coordinates for a given object.