Can someone ELI5 how to Fix iServices post install?

I have a late 2013 iMac 27-inch and installed OCLP with Ventura onto an external SSD. I updated the OS to Sonoma 14.5 through the App Store. I'm just really struggling to follow the instructions here: https://dortania.github.io/OpenCore-Post-Install/universal/iservices.html. Thank you.

submitted by /u/littl3mango
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