^^^^ Yeah, that looks like what RealOEM shows:
Here's the link to that site:
E30 325i Exhaust Rear
If you don't know, RealOEM provides exploded diagrams of every part on your car, along with the part numbers. So, if you want the part numbers for the extra fittings we've all been tell you to get... that link has them all.
That gash doesn't look too terribly bad. Weld it up real nice and you should be okay. What happened though? Someone get excited with a Saws-All?
Good luck on your install. If you need any help, just ask.