Peco Lectrics #PL-10 Turnout Motor The most reliable, discrete and simple method is to clip one of these directly to the underside of a Peco Turnout.
Requires a rectangular hole 40mmx 24mm The PL series of Turnout Motors is tried and tested, over the last 40 years we have sold literally millions of these motors. Simple, reliable and good value. Requires a rectangular hole 40mm x 24mm when clipped directly to the underside of a Peco Turnout. Use the PL-12/12X if above baseboard mounting is required; attaching PL-13 and 15 Switches will enable switching for automatic polarity etc.