Very nice Mazuko, 3M makes a clear double sided tape that is very good,super strong you can find it at most local hardware stores. It works great I used this tape on my UV light can't even tell it's there.What type of wire covering are you using, vantec,techflex?? looks good. Another thing you may want to do is get some UV molex and the ATX power connector set and swap them out also takes a little time but when your done it's worth it.
I used the Vantec UV yellow flex sleeves on my rig and ran EL wire inside overtop of my wires so now the sleeves glow that bright yellow on the outside but have the red glow on the inside from the EL wire.You can find the connectors at
www.jab-tech.com they have a lot of cool modding supplies.