Here is a link to the service manual for your laptop.
Scroll to p.75 to view the necessary pre-requisites and then the procedure to remove the Power connector cable.
There are two options with the power cable, dependent on the processor type installed in the laptop.
Here are the details with associated part numbers:
For use only on computer models equipped with an AMD processor 681973-001
For use only on computer models equipped with an Intel processor 681974-001
If you search online, using just the part number only, you will get suppliers of the part.
Here are just two examples (one of each type) to give an idea of the cost of the part and what it looks like. It is not a recommendation to use the suppliers shown. There are others online that may suit you better.
AMD processor type cable 681973-001
Intel type processor cable 681974-001
Hopefully this is of some help.