Hey Woosky,
The radiator looks like one from a DSM (Talon, Eclipse, Laser). The DSMs had the filling cap on the top half of the thermostat housing instead of the radiator itself. See the below picture:
According to a few threads on the board, you will need the DSM "waterneck", which is the top half of the t-stat housing with the cap. Evidently it will bolt up in place of the one without the rad cap. Did the person you bought it from tell you this was from a 1g/DSM? They should have if they didn't. One other thing about using DSM radiators is that they are slightly shorter that the stock radiator, which means that you'll have to figure out a way to interface it with the stock Rad. mounts. I think someone used screws in the top 2 pegs to extend up to the top mounts. Another member's input would be nice here /ubbthreads/images/graemlins/grin.gif. I would post up a WTB for the housing piece, as the TELs are not rare.
The big round thing in the center of your picture is the Camshaft/Crankshaft Angle (position) Sensor (CAS). It tells the ECU where the engine is "at" as it rotates, and is very important. The ECU uses this when pulsing the injectors and igniting the spark plugs.
Two types of CAS exist (for this purpose at least): the 1990 type, and the 1991-and-later type. Depending on the model year of the wiring harness you bought, the CAS harness connector will have one of two plug types.
If the harness is a 1990 year harness (I suspect yours is), the CAS harness plug will look like this:
The 1990 CAS has wires coming out of it to connect with the harness:
If the wiring harness is a 1991-and-later harness, the CAS harness plug looks like this:
The 1991 CAS has a connector built into it, instead of wires running from it to a connector.
You probably have a 1990 wiring harness, and a 1991-and-later CAS(the one in your picture is).
If this is the case, you will need to splice the new wiring harness. One good thing about your car being a 1992 model (and you've discovered this already, according to your picture) is that your old SOHC wiring harness will have a matching CAS connector (the 1991-and-later type). Cut the connector from the old wiring harness with a few extra inches of wire, and you can splice it up to the new wiring harness by finding the 1990 style plug (it's there somewhere hopefully!), and going at it with some solder and electrical tape. I believe the colors match, but I will double-check this.
EDIT: According to the circuit diagrams, the wire colors match:
This will make splicing the new harness sensor connector very easy. Post up your questions, and good luck /ubbthreads/images/graemlins/smile.gif!