when it comes to wires, i am definitely not the person to talk to

so heres my question..

i recently got this horn, and it has 1 wire connected to it...do i put that wire onto the positive of the battery? and do i need to connect an extra wire for it to be grounded?

also, the horn has a lever so i can adjust it to the way i want it to sound
heres a pic



thanks guys:o

 

the horn probably grounds to the frame through the bracket and you just need to run the 1 wire to a switch then to positive.