Where to Plug FM Booster Cable into

[immersion]

I Have just bought a FM Booster for my 03 Plarte it has a blue wire coming out of it where do i plug this into any ideas theres no instructions

 

[DPJ]

The power aerial supply coming out of the radio.

Failing that, the switched live.

 

[cocadave]

it should connect to the ignition live of the cars loom (so its only live when ignition is switched on)