10 GPS 158 Owner’s Manual2 Remove the 10 mm M6×1 Phillips screw ➊ and separate the swivel mount ➋from the base ➌�➌➋➊➍3 If you plan to route the cables from under the mounting surface, orient the baseso the pass-through holes ➍ face the desired direction�4 Using the base as a template, mark the pilot hole locations ➎�➎➏5 If you plan to route the cables from under the mounting surface, mark thelocation in the center ➏�6 Using the appropriate drill bit for the hardware, drill the three pilot holes�7 If you plan to run the power and transducer cables from under the mountingsurface, use a 5 / 8 in� (16 mm) drill bit to drill a hole through the mounting surfaceat the location you marked in step 5�Fastening the Swivel Mount without the Cables Installed in the MountFollow these steps only if you do not need to run the cables through the mountingsurface and the swivel mount�1 Place the base ➊ on the mounting surface, and fasten it using the appropriatescrews or bolts ➋�➋➊2 Place the swivel mount on the base, and replace the 10 mm M6×1 Phillipsscrew�3 Seal the cable pass-through holes with marine sealant�