I purchased an ez decoder without the plug so I could hard wire it to the circuit board of a spectrum 2-8-0 that does not have a plug.  The directions are only for a circuit board with a plug.  How do I wire the decoder to the older non dcc circuit board?  I thought there might be a diagram showing where to solder the wires. 
Anyone know how, or where there is such a diagram?
Thanks jsharger