What do I call this plug? Heater cable goes through it

[4thgencreamsicle]

I’m trying to find a replacement for this plug (that’s what I’d call it) but am coming up short. The heater control cable passes through it from the cab to the heater box blend door. At some point a rat chewed it up and I’d like to replace it, but apparently I don’t know the right phrase to search for. This also makes it hard to search the forums because I’m sure this has been answered somewhere else already.

The pic won’t load correctly so you might have to tilt your head to the left. This pic is taken from the engine bay and the heater control cable is coming out through the right side.

Edited to add that the plug is on the interior metal heater box.