I believe a portion of it is quite a low forecast for wind generation coinciding pretty closely with the morning peak.
The peak-trough consumption difference seems to be about 2GW, and wind generation averages about 400MW but can hit 900MW
If you wanna poke around with some historical data yourself, I scrape a lot of it for my own curiosity, and have opened up my dashboard
From what I can see, it looks like you have a SATA connector, though the power for it may need a special breakout, and an mSATA connector, both in the second photo