I see you have and R-25 classic. Some newer models had the radar mast moved forward, so the routing may be different. I have a 2007, and I believe 2008 was the same, where the mast is further aft. When I installed my radar, I needed to remove the 'smokestack', drill a hole on the forward facing side, and route the cable from behind the Raymarine display, up the starboard side window pillar and into the top overhead storage space above the helm/passenger seat. From there it routed through a hole in the ceiling into the false smokestack and through the drilled hole. It is the same routing used for the anchor light. If you are using a radar dome like mine, you need to unscrew the top, run the cable through the rear of the dome, and screw down the wires in terminal blocks used for the purpose.