Ideally, your Pending Connection Requests should be no more than 600-800.

Instructions on how to use this feature:

1. Click your extension
2. On the extension, click the LinkedIn icon
3. Make sure Auto-Withdraw Pending Connection Requests is selected 
4. Go to your Sent Connection Invitations (CLICK HERE)
5. Input your desired invitation withdrawal amount (will start with the oldest pending invitations)
6. Click "Start Withdrawing Requests"