Installation Horn

Hello. I want to install two snail speakers each brings two terminals without polarity. In the car horn there is only one terminal. I will have to put a relay. I imagine I am one that I found in the 30A and 12V drawer. I have looked at NET and there are several ways to make connections. In my case, where should I connect the terminals 85,86,87 and 30? The fuse serves me the 15th but where do I install it? .
I will very much appreciate your help. All the best

Hello, with respect to your description, it is most likely that the only cable you see is the positive feed You have (the one that I suppose has 12 V when you touch the horn switch) goes to the 85 reire terminal, the thermal 86 goes to mass (you can use the same mass with which you feed the speakers, depending on where you place the reread, if not any part of the chassis) and from 87 the cable comes out to the other horn terminal (remember that you previously connected the other terminal to chassis or dough).
The function of the reae in this case would be to bridge the Temónal 30 with the 87 every time I food reread by means of the cable that comes from the habitaculus switch (it would be the one that goes to 85 ...)
I hope the data serves you. greetings !

Look at the attachment of the sketch I have made. I understood you well? Thank you so much