For the Fakras colour code, see this thread.

This TCU teardown may also be of use.

cream WDCT is/was the 2.4GHz antenna. You appear to have two, which is unusual. You need to find out which one goes to the BT antenna.

Check your 54 pin connector wiring, it may not be correct for a TCU, and plugging in the TCU without checking can irepairably damage it. See this thread.