A system for magnetically securing an electronics enclosure that has a first surface, proximate a surface of a separate structure, comprising: a mounting apparatus comprising the first surface, a second surface, and an interface structure that is constructed and arranged to allow the mounting apparatus to be secured to the surface of the separate structure, with the first surface of the mounting apparatus closer to the surface of the separate structure than is the second surface of the mounting apparatus; and one or more magnets (24,25,26,27,184,186) fixed at one or both of the second surface of the mounting apparatus and the first surface of the electronics enclosure, such that the one or more magnets (24,25,26,27,184,186) are arranged to magnetically couple the electronics enclosure to the mounting apparatus; further comprising at least one secondary securing feature (62,65), where each secondary securing feature (62,65) is constructed and arranged to mechanically secure the electronics enclosure to the mounting apparatus; the secondary securing feature (62,65) comprises a mechanical securing structure that is arranged to be fixed to both the electronics enclosure and the mounting apparatus; the second surface of the mounting apparatus comprises an electronics enclosure interface structure that is structured to engage with a portion of the electronics enclosure; the electronics enclosure interface structure has two opposed sides; the system being characterised in that the mounting apparatus further comprises two spaced sets (78,80) of spaced first apertures extending between the first and second surfaces (14,16) of the mounting apparatus, each of the first apertures threaded to accept a first screw for fastening the mechanical securing structure to the second surface of the mounting apparatus; there is one set (78,80) of spaced first apertures proximate each opposed side of the electronics enclosure interface structure; the first apertures in each set (78,80) are aligned along an axis (84,85), and wherein the axes for the two sets are generally parallel; the electronics enclosure has exposed outside an end-face, on which a threaded second aperture is located; wherein the mechanical securing structure is a L"-shaped bracket that is connectable to said end-face via a second screw that is accepted into the second threaded aperture; and the L"-shaped bracket is also connected to the interface structure via the first screw that is accepted into threaded aperture. a mounting apparatus comprising the first surface, a second surface, and an interface structure that is constructed and arranged to allow the mounting apparatus to be secured to the surface of the separate structure, with the first surface of the mounting apparatus closer to the surface of the separate structure than is the second surface of the mounting apparatus; and one or more magnets (24,25,26,27,184,186) fixed at one or both of the second surface of the mounting apparatus and the first surface of the electronics enclosure, such that the one or more magnets (24,25,26,27,184,186) are arranged to magnetically couple the electronics enclosure to the mounting apparatus; further comprising at least one secondary securing feature (62,65), where each secondary securing feature (62,65) is constructed and arranged to mechanically secure the electronics enclosure to the mounting apparatus; the secondary securing feature (62,65) comprises a mechanical securing structure that is arranged to be fixed to both the electronics enclosure and the mounting apparatus; the second surface of the mounting apparatus comprises an electronics enclosure interface structure that is structured to engage with a portion of the electronics enclosure; the electronics enclosure interface structure has two opposed sides; the system being characterised in that the mounting apparatus further comprises two spaced sets (78,80) of spaced first apertures extending between the first and second surfaces (14,16) of the mounting apparatus, each of the first apertures threaded to accept a first screw for fastening the mechanical securing structure to the second surface of the mounting apparatus; there is one set (78,80) of spaced first apertures proximate each opposed side of the electronics enclosure interface structure; the first apertures in each set (78,80) are aligned along an axis (84,85), and wherein the axes for the two sets are generally parallel; the electronics enclosure has exposed outside an end-face, on which a threaded second aperture is located; wherein the mechanical securing structure is a L"-shaped bracket that is connectable to said end-face via a second screw that is accepted into the second threaded aperture; and the L"-shaped bracket is also connected to the interface structure via the first screw that is accepted into threaded aperture.