So it's electrically equivalent to the 153.
Here is the trick: Connect the return of whatever supply you want to use (at a voltage appropriate for the signal) to the layout common, that is, the outside rails generally. Connect the red wire to that supply. Connect the white wire to the control rail (insulated outside rail). Connect the green wire to the layout common. Get another lamp, that draws about twice the current of your signal lamps at the same voltage, and wire it in parallel to the red signal lamp (that is, between the signal supply and the control rail). For example, if the signal lamps are number 53 (120 milliamperes at 14.4 volts) use a number 57 (240 milliamperes at 14.4 volts). If you can identify what lamps the signal uses, I may be able to tell you a specific lamp to use. Alternatively, you can just use two of whatever is in the signal, in parallel. You can cover up the third lamp or, if you want, locate it somewhere on the layout, perhaps as a lighted billboard or some other lighted accessory, which will light up when the train goes by your signal.