These are the ignition lines. The red will be 12v constant, if you cut that tape off of there, there will be a pink line that is switched 12v
This is the general direction of the o2 harness, should be next to the trans fluid dipstick
You can see the trans dipstick tube to the right of the harness.
Cant really tell where that vac line is. The boost line needs to be connected after the T under the supercharger snout by the alternator. A T should be supplied with the gauge, just cut the line by the alternator, insert the new T and connect the lines back together along with the boost line.