Your Photo looks Identical to my RCM and the one labeled #3 in your photo is the one in question. Pulled the fuse out and there are contacts inside the mounting area.
Have looked at the solder joints under magnafying glass but cant tell taking it to work and going to the lab and put under a microscope that we have for checking these things out. I will say they do look a little ruff, and the resistor joints dont look to great, but cant tell if they are loosing contact or not.