Every horn needs two things...positive power and ground. You will need to verify what your old horn wiring does, as an example...the horn may be grounded to the body, and positive voltage flows through the wire to the horn when the horn button on the steering wheel is pressed. The other way is to have a positive at the horn, and the ground is given to the horn with the button pressed.
This is best verified with a volt meter or test light.
Your new horns may have on wire plug, it would be for the positive, as it gets ground from being bolted to the body.
You can realistically place the new horns anywhere, as you might have to extend your wiring to reach.
Testimonial: "thank you much the old horn was single & had 2 poles ,so can i connect the 2 hornes with these 2 poles ?"
I believe this is same as 1996 marquis hopefully this helps
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