Thank you Jeff Suovanen for the instructions and I successfully replaced my battery without any trouble. The only thing is I noticed I'm getting 7510 mAh now at full charge capacity. The ifixit.com Europe Store said I would get "Capacity: 7610-8460 mAh."
Thank you so much for the instructions! I just successfully finished the replacement with (Seagate ST10000NE0004 Iron Wolf Pro 10TB Internal Hard) and I can confirm everything works just fine.
Note: Both rubber pads inside will still need to be slightly trimmed as written in "Step 6".
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