wiring

[pjf]

Question to Mr Bachman or to all who is in the know.
I just purchased  a 4-4-0 Russia and  sound only decoder MRC 1665, 2 wire hook up.
I noticed there are 2 empty terminals marked L and R side on the aft side of the circuit board. It is alive reading 18 volts same as the track voltage or the EZ Command output.
Is this the right place to solder my wires or you have other recommendations.
Thank you