In this video, I replace the back lift assist struts on my 2010 Chrysler Town & Country minivan, but should be close to the same for most hatchbacks, trunks, hoods & anything else that uses these things. They are gas-charged gizmos that take part of the weight of the hatch (or whatever) to make it easier to open & close. (The big golden retriever is Smitty & the puppy is Bella or Bella-boo)
https://rumble.com/v22w1bo-20221228-how-to-install-lift-support-struts-on-minivan-hatch.html