Yes, please find installation guide of Hybrid IP65 GPS attached. Also find wiring diagram for EuroTMS Triptracker with ibutton and private business switch attached.
No, once the unit is in deep sleep mode it is completely dead (the modem is turned OFF) in order to conserve power. The unit will only wake up upon vibration or at its preconfigured interval/time.
Depends on the enclosure, please contact us when in doubt. Since the unit has internal antennas as long as the top cover is facing the sky and is not covered by metal it should still communicate.