FishSpy is attached in exactly the same way as you'd attach a marker float.
FishSpy is supplied with one boom. We recommend using a minimum of 50lb braid for your main line, in conjunction with a FishSpy boom for your lead.
Please note the FishSpy boom has been designed and manufactured to always break before your 50lb braided mainline. Always ensure you use your boom when casting FishSpy.
In the unlikely event that FishSpy becomes detached from your line, don't worry - the camera floats, so all is not lost.