jumpers you need are on the underside of the board near
the joypad ports. So turn the board over and position it
so that the joypad ports are to your right.
You should find the cluster
of jumpers (6/7,8/9,10/11,12/13).
|These will be zero ohm
(surface mount)resistors, you need to get your soldering
iron and remove these links on 6/7,10/11 and 12/13
DO NOT REMOVE THE LINK ON 8/9
Assuming you've got a European
Saturn the jumpers will be connected like this
Once you have removed the
links you need to solder 3 wires, one on to each jumper
pair. You need to solder onto one of the 'common' pads in
the jumper pair. These common pads are indicated in red
in the previous diagram.