DesignRail Kit (QC) Quick Connect Level Post Kits by Feeney are termination posts which are required for any level DesignRail Kit cable section. Use QC side of CableRail Kits with Quick-Connect Posts. Quick Connect fittings are the non-tensioning. QC Level Posts are used with Level Rail Kits by Feeney. 36" Post Requires 9 Cable Runs, 42" Post Requires 11 Cable Runs.