Wifi/bluetooth iPhone 6s Plus

I recently replaced the loud speaker on a iphone 6s plus. Once I put it back together the wifi and bluetooth only worked intementantly and was weak. I took phone back apart and checked all connections and couldn’t see anything wrong. I started putting things back together and was able to get it working again. Now it’s been a few weeks and its back to dropping signal again. My thought is I may have damaged wifi/bluetooth cable, but I also notice several other “wifi” cables and I’m not sure where to begin. Nothing looked off so I’m struggling to figure it out. In the repair guides, I’m only seeing the one cable listed as both wifi and bluetooth so I’m thinking that’s it. Am I thinking correctly? Everything else including cellular is functioning properly.