Ice maker assembly harness problem

The ice maker in my LG LFX25974ST refrigerator stopped making ice. The ice tray actually stopped in an upside down position. The reset button when pressed gives me no tray movement. So I decided to replace the ice maker assembly. As a novice DIYer, everything was going smoothly until I came to the wire harness. I don’t know how to disconnect it to remove the assembly. I don’t want to get too forceful with it. I have attached an image. It’s probably one of those simple things I should know. Any help would be appreciated.