Where to find simulator build ?
Go to ~/Library/Developer/CoreSimulator/Devices/
You will find directories with alphanumeric names
then click on the one of the directories and make following selection
Again you will find directories with alphanumeric names if you click on that you will find
Simulator build over there
Installing iOS device build on simulator will not work out.
iPhone simulator uses i386 architecture iPad simulator builds uses x8
Installing the build manually on simulator
xcrun simctl install booted *.app