The image above is the full AUDB board from the CLD-D704. The details are too fine and the raw scan is over 1.5mb in size for me to use it as a good bed for detailing the RF jumper. I have composed another image which shows the extreme lower left and lower right corners of the AUDB, which is where all our action takes place. The blue areas highlight the actual connectors involved. The green bars indicate the jumper which must be added.
Proper polarity is very important.
Reversing it can perminantly damage the AUDB board. Care should be taken to not heat the solder points for too long a period. The electronics on the board are heat sensitive and excessive exposure to the sodering iron may damage them. By adding a new external connector to the player, a hole must be drilled into the back plate. You may have to move the serial number sticker to another location.