Mine are activated anytime the interior lights come on. If I recall correctly all I did was run a wire with inline fuse to a slot in the fusebox that is live whenever interior lights are activated--locking or unlocking open door or hatch. Only downside if you consider it as one is that if a door or the hatch is open they stay on until they time out. There are also on anytime the key is in run position. They've been that way for several years, no problems.

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X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interior
Dallas