That circled one looks exactly like the one I had to get. Comes with the updated pigtail that had 4 wires in it and the instructions to wire it up correctly. Was a piece of cake....used to work in car Audio and also dabble in home theater... mainly sales, but enough install experience to get me through simple trouble shoots and to not have to pull an installer off a job for an R&R.
If you have any experience in wiring doing things right, I.e. Solder or solderless connectors with proper stripping and crimping tools.....not wire nuts and electrical tape, you should be fine, I'd say the most difficult part was just the awkward position to get in there and splice that harness in. Am old, out of shape and my back and neck don't bend like they used to. But others will chime in that it is still nothing to be intimidated by.
You can do it, yo