What is this for on rear sub frame?

[RickTaff]

Its a ZXR750 J1, I bought the bike privately and the accessory on the end of subframe in the picture; with 2 phillips heads and a cable coming from it is not on mine.

What on earth is it for? I'm stumped...

[NJD]

Seat latch.

Locks the seat in place and usually requires a the ignition key to be turned in a lock (usually poking through a fairing) to remove the seat to get at whatever is underneath.
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[photoman]

Is the cable bare wire or sheathed in plastic/rubber?

If it is the latter could it be an extra earth lead? Was there an electrical fitting on the back that needed to have this to complete the circuit.

[xX-Alex-Xx]

[Islander]

Yep seat latch. The cable is for the operating lock.