The Set Action Delay action will let you set the delays involved in the dragging, but that will not slow the drag down per-se.
You can extend @Tom’s idea of holding the mouse down and then moving with multiple actions before releasing the mouse.
For example, something like:
- Click and Hold Mouse
- For N in Number Range 0…10
- Move Mouse 1172 + (1260-1172)/10 * N, 683 + (742-683)/10 * N
- Pause
- Pause
- Release
At the end of the day it depends on the behaviour of the target application.