Once you've gotten good at entering into Squid Guard, it's time to work on a couple of high percentage sweeps.
This first one arises any time your partner is postured tall, allowing you to grip their far pants leg:
This time, your partner is driving in, possibly for a knee-cut guard pass. The key here is to turn the corner, and to do this, you need to release your foot from their lapel (from the "worm hole"). Now, it's a basic single leg takedown, which can easily switch to a double leg for the finish.