Rob, which size cabunchos do I need? The LED is 11mm and they only have a 10mm and then a 14mm round one? Also how many of the piggy back fuses do I need? Just checked your diagram, one piggy back to 2 LED's right? So only 6 needed?
Order the 10mm lenses as these fit perfectly within the vents, the LEDs are actuall just behind the vents once they are siliconed in place.
As for the fuse holder, you only need the one. All the positive one the drivers side connect to one terminal block and you do the same on the drivers side. Do the same with the negative too. Feed a cable between both sides of the car and connect the positive and negatives together, you then add the additional cable from the passager terminal block to the fuse holder with the positive going to it, the negative just on the car body to earth it.
Hope this helps?, if still confused I'll try and do another diagram for you later.