It’s the other way around; you connect to seeders.
In the example of 2 (3), there are 3 total seeders and you’re connected to 2 of them.
Although in your screenshot, you’re at 100%, so you’re not connected to any seeders at the moment and are, yourself, a seeder. You have peers (leechers) connecting to you. Same principle applies; in an example of 2 (7), there are 7 peers in total, and 2 of them are actively leeching off you.