Ported or manifold vac for overdrive bypass vac switch?

Those work off the fluid pressure at the governor port.
Governor fluid pressure relates closely to the cars speed.
When your road speed reaches about 44 mph the switch that has 44 on it closes causing OD to engage.
The higher number switch does the same for lockup at about 52 mph.

It’s odd that neither one seems connected.

Should They have a wire running from the other tabs as well?