A force transmission mechanism of a surgical instrument, the force transmission mechanism being configured to releasably engage with a drive interface device located at a patient side cart of a teleoperated surgical system may comprise a housing comprising a side wall surrounding an interior of the housing, one or more drive components in the interior of the housing, a releasable coupling mechanism configured to releasably engage the force transmission mechanism with the drive interface device, wherein the releasable coupling mechanism has a longitudinal axis and is pivotable about an axis oriented approximately perpendicular to the longitudinal axis.