1960 Valiant Universal Turn Signal Install

First you want to be sure you get the right type. Some are designed for separate turn signals and stop lights and some are designed for integrated stop/ turn lamps like your car originally had. WHY are you doing this instead of "fixing what it had?"

They should come with destructions.

The inputs are:
hazard / 4 way flasher , which may be built in
Turn signal flasher
Stop lamp switch if the switch is built to handle that

Outputs are left front turn, and right front turn
Left rear turn (and stop)
Right rear turn (and stop)