2 Speed Wiper Motor Nut Question

I would like to stand corrected. The FSM doesn't list a torque spec for the wiper motor at the end of the electrical section (at least in the 1966 Dart FSM I have access to right now.) In this manual is states " place the motor on the 3 mounting studs and tighten securely."

Removal - Dart Models
(1) Disconnect wiper link at wiper motor. For variable
speed motors note position of spring trip.
(2) Disconnect wiper motor lead wires at wiper
motor.
(3) Remove the three nuts attaching wiper motor to
wiper mounting motor bracket and pull motor from
bracket mounting studs and out from underneath instrument
panel.
lnstallation - Dart Models
(1) Position the motor on the three studs on the
mounting bracket and install three mounting nuts.
Tighten mounting nuts securely, making certain
motor ground strap is in place.
(2) Connect lead wires to wiper motor.
(3) Connect wiper link at wiper motor and install
spring washer and retaining clip. For variable speed
motors, position spring trip as outlined in “Wiper
Link Assembly.”