91 imperial remote key, reciver dosnt seem to work, help

Hello I need help with configuration of my key in my 91 imperial, I’ve already found the wire and try to conect it to ground as it says in the instructions but it didn’t seem to work,
Update, I found the following port unplugged, I don’t know if it correlates to the one in the second image but I can’t seem to make it work, should I replicate the module of the keyless receiver or am missing something?

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Author: cahuazaki