I'm guessing your talking about gettin the cabling thru the pipe?
#1...... Look where the other wires were run.
after that it's a crap shoot....When they build that stuff , there are certain routing that they do....It may be good and then again it may not be so good.
I do a lot of this type stuff. It's different all the time.
The easiest way to fix it is take the boat to a tower shop and have them make you a 2in pipe with flanges on each end.
this is custom built to connect the console to the E-box.