The packard connectors are usually just lamp wires with spade connectors although new ones have a pin connector that has no commonality of anything else I have come across.
I have sacrificed the required PC end of old flash cables to give a length of wire that ends in two bare wires with are connected with solderless connectors to the wires of the Packard shutters ( which is usually just lamp wire).
Alrenatively you can order the end you need on bare ended wire from Paramount cords.
My Packards are mounted on 2 inch thick board as big as the packard dimensions with the barrel diameter drilled out. this slides over the lens barrell and places the shutter in front of the lens. Ungainly but it works.
Other packards will fit within the bellows or in place of the mounting board, behind the lens. In a dark room it is possible to open the lens shutter,be that a hat or a t setting, and then fire the flash then close the shutter.
Others will supply more ways to do it I am sure