2000 Ford Focus door locks help

 I bought a freeway central door locking system FAI-586 and alarm system

for the daughter for Christmas. I have a bunch of questions.

• IT looks like the alarm can be connected 5 different way. The locking system

              has A WHITE/  lock  wire  and a brown unlock wire  coming from a black box ,how can I tell if it neg or pos touch-off?

• DO I have to run wires from the relay box to each door actuator? Or are there

factory wires I can connect too?

• Were the best place to mount the relay box unit??
• Is there a trad Trick to installing the actuators, Location Ext.?

This is the best sit

Thank M & M