How to Install a Moch-1 Unit.

hi,

i trying to install a moch-1 unit in
my '87 carrera targa.
I have only 2 cable in the back, one
for the right and one for the left speaker.
But the moch-1 unit has 4 connections.
2 for the tweeter and 2 for the woofer.
Is there somebody who can explain to me how i install this unit ?

Thank you guys

cu

911CT