It’s just off Harbor, turn onto Disney way and ou will see the sign for it on your left at the next light.
If you are taking the 5 to
Disneyland just take the harbor exit and head south.
Here is a dropped google maps pin to the driveway to the lot.
It’s a bit of a walk, but, for instance, I’m pretty sure it’s a shorter walk to the Esplanade than walking from Mickey and Friends.