I'm closing in on summer and have two Evinrude Big Twins on the transom of the Texas Maid. I plan on installing two leads from the battery to connector posts screwed into the transom, so I can use shorter red & black cables from each outboard (equipped with starter buttons). I'm thinkin...drill a hole under each outboard in the splashwell and install a rubber grommet so the cables from each motor can drop down through the splashwell to the transom-mounted connector posts. So...what's the best way to drill a hole big enough for two battery cables through splashwell aluminum? Anyone done this? Back the under side with wood and just drill through? How do you size a rubber grommet for this application. Hate to drill the splashwell, but there's too much clutter in there with four control cables. Pix of the Maid and splashwell layout are attached. A 56 Lark has replaced the little Johnson 18 in the splashwell layout pix.
