The three breakouts from the ECM harness are covered with standard black tape and some very heavy black tape. This makes the harness very inflexible, and if forced, could cause a wire to break internally which could be a big and difficult to find problem. The harness will be much easier to re form as required for unstressed installation with the ECM plug in adapter if the black covering is removed. This covering can be removed without sharp scissors or knifes if you patiently find where the last wrap of black tape is, and simply start unwrapping it from there. The plug end and the harness end of each covering is wrapped separately on some cars, and on others it is wrapped from the plug end all the way to the harness end, so look for the tape end on the harness end, and start unwrapping from there.
Once the three breakouts are unwrapped, the loose wires can be easily moved without stress.