It is not a case of just getting power to the tender from the forney.
The 69232 sound tender with the 5 pin connector has all 5 wires used.
2 wires are for track power to go to the tender rear connector for lighting passenger cars attached to te tender.
2 wires are for the 5 volt rear light on the tender which is direction sensitive
1 wire for the sound unit, the other sound wire is from the 2 wires to the rear connector.
reason for this......The switch inside the engine controls lights and sound per the loco manual and these wires are connected to the switch via the 5 pin cable on the 2-4-0 over sized seamer.
I wired up the 5 pin connector as follows and changed the bulb to a 24 volt version.
I wired 1,2,4 together, then 3 and 5 for the other wire. Tender light will be on all the time, but adding a diode to the light wiring inside the tender can polarize the light for direction.
http://1stclass.mylargescale.com/DanPierce/69232wiring.JPG