I've remixed the original design to make it attachable to an higher part of the 2020 profile: the bracket now connects on the external side of the 2020 profile so it doesn't collide with the linear guides.
I've also made the bracket longer so you can put it at any height you prefer and it will flex a bit to let the print head reach every spot of the printing area.
Please be advised that the object is pretty thin on the side it connects to the cable, so if you don't have a perfect bed adhesion you'll probably need a little raft to keep it on the bed while printing
Disable motors, and while keeping the cable with one hand, try moving the hot end on every area of the printing volume, trying to keep the cable in your hand the higher possibile from the base of the printer.
When you have found the highest place you are able to keep the cable without forcing the hotend, place the bracket there and connect the cable to it. Try again moving the hotend, you should see a little flexing on the most distant place reached by the hotend.