The two outer holes are used to attach mounting studs beneath the baseboard. The larger centre hole is where the drive pin of the motor is positioned and threaded through the tie bar of the turnout.
Peco Lectrics, Twistlock Turnout Motor - Peco PL-1000
Peco PL-1001 Pecolectrics TwistLock Turnout Motor w/Microswitch
Peco PL-1001 Pecolectrics TwistLock Turnout Motor + Microswitch
Peco PL-1001 TwistLock Turnout Motor + Microswitch Pecolectrics
Peco PL-1000 Pecolectrics TwistLock Turnout Motor
Twistlock Turnout Motor Peco PL-1000
