Pat - The black tube is puddied in and covered with a few layers of glass. It will allow drainage from front to back and add additional support for the fuel tank.
The plan is to make the grid . . . which should resemble the pic from the mosley article.
http://www.classicseacraft.com/moselyarticle11.htm
To run the cables . . . I'm going to glass a pipe to the bottom of the fuel hatch cover. The wires will be snaked through that and come up inside the console. Towards the back . . . I'll cut hole through the stringers and glass in a section of PVC or ABS plastic, so the cables can come up through the bulkhead into the splashwell. You can see the notched fuel tank in some of the pics . . . That's where the pipe will fit.
Fuel Fill and overflow will be mounted on the console.
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I love jersey . . . but I haven't been back there since I broke up with the x-girlfriend.