Your headlight that have no center motor most likely have two 944 headlight motors running each of the headlight buckets...you have to get into the bonnet and look behind the buckets to see the motors. No oil cooler in the passenger rear wheel well means is consistent with aftermarket conversions...and oil cooler is up front....not like the original configuration. Rocker extension caps are just plastic inserts and are cheap replacements...dont' worry about them as long as you have the jackports on each side. Rear ducts without oil cooler are just for looks and have no functional objective. They're probably just sealed off.
Go to this linx and see what a REAL slantnose that's been meticulously maintained and restored looks like...I use it as my benchmark to see what I need to do with mine:
Rennlist Member Gallery :: 1989 Factory Slantnose
Best of luck with your new car.
Chuck