where is my 172 ph2 alarm siren

[Terrydb]

hi guys i need to find my alarm siren for my car as it no longer wants to work ive looked under the scuttle and its not there but there is a square box that says cobra on it behind my headlight on the passenger side is this it ? also how much to replace it

Thanks

terry

 

[Jonesyuk]

should be under the sctulle panel, mack bang in the middle

 

[Jekyll]

Behind the front passenger arch liner is where mine is.