Hello, while cleaning my 1993 240 wagon B230F engine for the first time, I've discovered a few disconnected wires and other questionable things. Please help me identify the function of each item pictured below.

#1 - A/C
Clearly the A/C condenser, but what does this wire do?


#2 - Alternator
Green wire near the alternator, zip tied to two other wires connecting to the alternator. Does this connect to the engine block wire below the exhaust manifold shown in pictures #3 and #4?


#3 - Below Exhaust Front 1
The jack in the engine block which receives the plug shown in picture #4, which was connected, though the wire may have been broken. It's below the exhaust manifold, near the front of the block, by the oil filter.


#4 - Below Exhaust Front 2
The plug which connects to the jack in picture #3. Does this connect to the green wire near the alternator? This plug wire is black.


#5 - Below Exhaust Rear
A jack in the engine block which looks like the one shown in picture #3. Should something be connected to it?


#6 - Below Distributor
A jack and plug below the distributor and intake manifold. The plug looks similar to the one in picture #4. This has been disconnected for a long time.


#7 - Starter
A jack near the top of the starter which has nothing connected to it. Should something be connected to it? There's another one on the bottom of the starter with a wire connected. I had my starter replaced, so maybe something wasn't reconnected?


Thanks for your input!
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- FireFox31