I need a small electric vacuum pump for a non Mercedes application

I have attempted to attach a gif file representing a vacuum pump I have recently acquired.
The pump is supposed to be from a 1986 S class I believe it to be the pump located under the rear seat for door and truck lock applications.
I did not remove the pump
I am not familiar with the 1986 S class chassis or vacuum system

the image should show two white dots on the lower right side that I believe to be power connectors.
and three white dots in the circle above those two represent a three prong electrical connector.

can anybody tell me a simple way to hook this up to develop vacuum?

I should have labeled the connectors
we can call the pin in top left of the blue circle 1
top right in the blue circle 2
bottom center in the blue circle 3
top of the two large bottom pins 4
and the bottom large pin 5


the dark circle on the left looks to be the housing for the pump motor itself
and the black dot in the grey box above the other box represents the vacuum port

the image represents a molded housing of a single dark color that does not photograph well

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