Hi there, Karen!
The night and time for your California Grill reservation are very lucky ones, indeed! According to the
official Magic Kingdom calendar, Wishes! Nighttime Spectacular will occur at 8:00pm. You'll have the perfect viewing spot for it: atop Disney's Contemporary Resort (and the audio for the show is piped in). And even if you do not get a window table, you can head toward the outdoor catwalk and enjoy it
al fresco!
The Electrical Water Pageant has a pretty similar circuit nightly:
Polynesian Resort -- 9 p.m.
Grand Floridian -- 9:15 p.m.
Wilderness Lodge -- 9:35 p.m.
Fort Wilderness -- 9:45 p.m.
Contemporary Resort -- 10:05 p.m.
Magic Kingdom -- 10:20 p.m. (only during Magic Kingdom Extra Magic Hours).
You are welcome to "hang out" at the Contemporary to watch the pageant at 10:05 PM, following your leisurely meal. Because there's no guarantee that you will be seated promptly at 7:45 PM, I would hate to recommend any other viewing location to you. Your best bet, I think, is to relax at the beautiful Contemporary until the pageant floats by.
Have a wonderful time!
See you later, celebrator,
-Deborah B.