Batery replacment on a volvo fh key fob

Key fob gon dead no my fh v5. Replaced battery & stil dead!
Was working ok on Sunday.

One of the connectors that go from the battery to the fob PCB can snap off. I think at ours we usually have 4 or 5 that need to be unlocked manually.

I didn’t take any pictures but if I come across one in the next couple of days I will snap it so you can see what to look for.

This one is fine but I have seen them where one of the connectors has broken free, can’t remember if the solder joint separates or the metal fractures above the joint.