install alarm to a 99 dodge stratus

Make sure that you have a DMM to test the wires that you probe to make sure that they are the correct wire. Do not assume that the wire codes are always correct, they are a guide. As far as connecting these wires you want to find your starter wire that you suspect being, cut the wire and attemp to start the car. If  the car cranks that's the wrong wire. If it is the right wire, the wire leading back to the starter will go to the wire on the relay from the alarm marked starter, the other side of that cut wire will go to the other wire on the relay of the alarm marked key side or switch side. Then after that find your ignition wire where it will only show you 12 volts when you turn the key to the on position, not all the way where you would crank the car, and 0 volts when turned to the off position.  Remember never probe wires that are contained in a yellow loom, probing these wires may and can deploy the air bag system causing serious injuries. Be very cautious around these wires. Hope this helps you a little bit.