Vacuum switch/oil reservoir wiring

[charpenn]

Need electrical wiring help.

I acquired a 185HP-V6 having a wire that comes from the oil reservoir (probably the oil level sensor switch) with a 1/4 inch grommet connector that is disconnected in the engine. A second wire from the oil reservoir is connected to the vacuum switch in the engine that is wired to ground. That puts the oil level switch and the vacuum switch in series to ground. Where should the disconnected wire from the oil level sensor switch be attached in the engine?

[boats.net]

Should be two wires from oil tank, the wire with knife connector connects to brown wire on engine, other tank wire goes to engine ground.

[charpenn]

Vacuum switch/oil reservoir wiring

Boats.net replied with: Should be two wires from oil tank, the wire with knife connector connects to brown wire on engine, other tank wire goes to engine ground.

My Question remains:So since one of the two wires that come from the float level sensor in the oil tank goes to a knife connector and brown wire that goes to the vacuum sensor and then to ground while the other of the two wires from the float sensor in the oil tank is to be attached directly to engine ground, where is the source of electrical current for both sensors if the engine end of both wires from the oil reservoir are engine grounded?