Dave,I've only been on here a few months and have yet to figure out all the jargon you experienced guys use...Explain please 1x6....1x7 ????Looks like the tower & box has been patched and butchered.
If it really bothers you, Best try to find a replacement unless you are good with sheet metal fab and repair work.
What's there now is actually a piece of Cub 1x6 1x7 firewall!