get two alloy strips 30 40 mm wide by 150mm long and bend like |__  <== this...x 2 and mount the

bent alloy pieces                                                                                  |

in the cup holder minus the top cover that has to be taken off.. or it won't fit..drill two holes where the cup holder catch sit's but down on the flat part, and route the power ducer cable. i used some spare 2mtrs twin core tinned cable to the battery and bolted to the battery as they had bolts on them, so used them instead..then mount the ducer at the far right corner with sikaflex 291i to the hull.. and you're good to go...