Glad you found it!
There are many ways to access the POCO or Skyhook. Now that I’m at my PC I can share some pictures.
This submenu works the same for both the POCOs and Skyhooks:
I often use this to warp to within 0 m of the next POCO/Skyhook and then open it.
Within the Planetary Industry window you can rightclick the planet directly, allowing you to skip two submenus in that list.
My preferred and quickest way to open the POCO/Skyhook is the radial menu. Pressing the icon of the POCO or skyhook while you’re next to it brings up the radial menu. If you click, hold and move your mouse up it’s really easy to open the POCO/Skyhook:
While this option is a lot quicker than the first picture, it requires you to know where the Skyhook is to click it. Not as helpful when you just undocked and are looking into a random direction of space, but real useful if you just warped to the Skyhook or POCO and it’s in front of you.