Your description is unclear as to exactly what's going on with your Switch. It sounds like you're talking about the larger of the two LCD ribbon cables, but I can't tell for sure. Is it this one?
If that's the case, you have me stumped as to what you mean when you say you put the cable in the wrong way, and even more confused as to how you lost the golden pens (pins, I assume?).
I'd suggest you post a picture of the damaged part and then we may be able to figure out what you're talking about, because your description is just plain unintelligible.
Adding images to an existing question - iFixit Repair Guide
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