Yours is secured better than ours, we had the brackets but no screws to the boat, just sorta flopped around.
It moved enough that the wakeplate wires (2 of from the connector that run around behing the mounting plate) had their insulation removed and bare wires showing. Fortunately they hadn't yet touched, fixed it up and put some corrie conduit on and sanded the sharp edge on the mounting panel.
When we screwed the brackets into the boat we could only gain access to 2 of the 3 brackets, bit like yours in the picture. We've 3 pumps mounted on that board so pretty busy with motors and tubing!
2 months maybe 3 to go till we can take ours out again.....but who's counting.
Hope you are enjoying the season there.
Cheers BruceR, Melb AUS.