A rear slider window assembly for a vehicle, said rear slider window assembly comprising: a frame portion having an upper rail and a lower rail; at least one fixed window panel (316, 318) that is fixed relative to said frame portion; a movable window panel that is movable along said upper and lower rails, wherein said movable window panel is movable between a closed position and an opened position; wherein said movable window panel has a first electrical element (322, 323, 324) established thereat; wherein said at least one fixed window panel (316, 318) has a second electrical element (322, 323, 324) established thereat; characterized in that said first electrical element is in electrical connection with a power source of the vehicle and remains in electrical connection with the power source of the vehicle irrespective of whether said movable window panel is in said opened position or said closed position; wherein said first electrical element is in electrical connection with the power source of the vehicle via a flexible cable that has one end secured to and electrically connected to a first electrical connector at said first electrical element at said movable window panel and that has its other end secured to and electrically connected to a second electrical connector at said at least one fixed window panel; wherein said flexible cable comprises a flexible cable that flexes responsive to movement of said movable window panel relative to said at least one fixed window panel; and wherein a guiding element is disposed at said movable window panel and is configured to move along said flexible cable to limit flexing of said flexible cable between said movable window panel and said second electrical connector at said fixed window panel (316, 318) as said movable window panel is moved relative to said at least one fixed window panel. a frame portion having an upper rail and a lower rail; at least one fixed window panel (316, 318) that is fixed relative to said frame portion; a movable window panel that is movable along said upper and lower rails, wherein said movable window panel is movable between a closed position and an opened position; wherein said movable window panel has a first electrical element (322, 323, 324) established thereat; wherein said at least one fixed window panel (316, 318) has a second electrical element (322, 323, 324) established thereat; characterized in that said first electrical element is in electrical connection with a power source of the vehicle and remains in electrical connection with the power source of the vehicle irrespective of whether said movable window panel is in said opened position or said closed position; wherein said first electrical element is in electrical connection with the power source of the vehicle via a flexible cable that has one end secured to and electrically connected to a first electrical connector at said first electrical element at said movable window panel and that has its other end secured to and electrically connected to a second electrical connector at said at least one fixed window panel; wherein said flexible cable comprises a flexible cable that flexes responsive to movement of said movable window panel relative to said at least one fixed window panel; and wherein a guiding element is disposed at said movable window panel and is configured to move along said flexible cable to limit flexing of said flexible cable between said movable window panel and said second electrical connector at said fixed window panel (316, 318) as said movable window panel is moved relative to said at least one fixed window panel.