If I remember correctly that spot can be reached by using the Meat Wagons to destroy a couple of walls that lead to that pendant.
Without screenshots I can’t be sure if it’s the spot you meant though. If you wanna upload a pic of the spot, paste the link in the reply box, highlight it and press the </> button that shows up in the middle above the text box, it lets you post links.
Here's a gif to show how it works. (Click me!)
