I had no idea how to open the trunk cover to access the antenna box, and I opened it up and did not break anything
The kinks are due to the tape that they use to bundle these wires together. When we open the trunk, the wires should be able to slide against the rubber boot, but because to the tape, they got stuck and just sit there to be kinked. I removed all the tape bundled at the boot ends (top and bottom), leave the wires only, spray them with silicon lubricant, put some grease on the inside of the boot at the bends to make sure it slippery enough for these wires to move freely when the trunk open or close inside the tube.
BTW, this is only my opinion, don't blame me if something goes wrong.