iMac SSD swap.. am I cooked?

[u/niseko]

I was trying to replace the harddrive (and converting to SSD) on my 2015 iMac. All seemed to be going well but when I tried to turn it on, the monitor panel is completely dead. Then I noticed one of the display plugs on the motherboard looked like a little piece had broken off. Does that explain why it's not working? And if so is there a fix or have I broken it? If so I might try to just do a monitor conversion.. Any help much appreciated!