Began the day by drilling several in the mid rear bulkhead (F-704) to enable the installation of zip ties to secure the SV cable to the bulkhead. Adjusted the cable length for service loops and snugged down with zip ties. Installed the aft connector on the SV cable and plugged in to the ADHRS unit. Barely enough clearance to seat the connector, so I may move the ADHRS unit below the bracket where a second ADHRS unit would be. This would allow ease of access to the unit and connector for possible maintenance. Installed several more cable tie downs. Trying to secure all these wires is a PITA especially when instructions are minimal.