I purchased a L.E.D under body kit and I need advice installing it. Each tube has to be connected to the distribution block by way of the inch and a half wide connectors. The distribution block has to be mounted inside the car to minimize heat and weather exposure. This is where I see a problem. Where can I cut a hole big enough to run the connectors through with out worrying about water coming through. I have searched the firewall up and down looking for a plug or grommet big enough but no dice. Any help in this matter would be greatly appreciated.

can the wires be cut and soldered together once they are in?

That is going to be your best bet. Just tie the wires into to each other. That way you wont a need a big hole to send them through, and then you can use the rest of the distribuiton block for neons inside the car or whererver. Put go through thr rubber boot on the drivers side right underneath the brake cylinder.

If I tie the wires all together, will I still have the functions of changing the color and scan as well as having it light to the music?

no functions will change as long as you match the wires exactly as you cut them. if there are more than one of one color, label them!