Garrett Metal Detector GTI 1500 Owner's Manual page 12

Image C Image D
of the searchcoil can be changed easily,
if required. To connect the cable to the
detector, insert the cable connector into
the connector on the control housing as
shown and rotate the collar clockwise until
secure (approximately four () turns).
(See Image D above.)
Hand tighten only. Your GTI 2500 is fully
equipped with eight (8) AA batteries.
12 - Garrett Metal Detectors