i think the charcoal canister is sumthin to do with petrol fumes? And that brackety thingy on the back of the block is the driveshaft bearing carrier bracket. The driveshafts are unequal length, so like the shaft comes out the diff, through that bearing (thats missing) and then down to the CV joint.

People usually make their own bracket there and stick on the bearing carrier from whatever car the engine is going into. I'm putting my 2.0 blacktop in a mk4 fez n it took fukkin ages to work that out lol. I found it a huge help getting a workshop manual.

The mk4 fez bracket doesn't fit so am in the process of making one from a lump of sheet steel and drilling the crap out of it to get it to fit.

Dangerous Dave