..."how to hide it".
Per Mr.600HP02's request here's what I did.
1. Find some 3/8" plastic line clamps. I got these fashionably black clamps in the electrical dept. of my local ACE hardware store.
2. Cut off the front tab on the clamp. It's not necessary.
3. Scuff the backside of the clamp with some scotch-brite and attach the 2-sided 3M tape. Trim off excess tape.
4. Clean the mounting area with alcohol or equivalent and attach the clamps. I used only 2, a 3rd clamp would have completely hidden the wiring but I found out it put the boost gauge line in too much of a bind.
5. Finished product.