Below are step for connection :

Step 1: open ec2 -> Run or start instance

Step 2: Select instatnce and connect above connect option.

Step3 : Select SSH client and copy Example below copy ssh.-i.......

Step4: Open the folder where key pair pam key is available.

Step5 : Right click on outside and open the terminal option

Step6:Open the terminal

paste the url of ssh - i and enter.

Step7:Ask for Yes

Enter yes and then again enter

Done now on local window machine