Splice with several cables (branch point)
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2006 Volvo S80, 2005 Volvo S80, 2004 Volvo S80, 2003 Volvo S80, and 2002 Volvo S80. However, it is still accessible from the selected car via links, so may be relevant.
Select a butt connector large enough to take the cables to be inserted on the same side.
If a single cable is to be inserted on one side of the butt connector it will more than likely have too small an area compared to the opening in the butt connector.
Strip the cable to double length and bend it double.