Can I use electrical tape instead of the plastic tab when replacing my hard-drive?
I definitely would not use electrical tape. Honestly, if for some reason you do not have the plastic tab that came on the HDD, then you can go without it when you replace it with the SSD. The opening is large enough you can get a finger between the SSD and the side rails, should you ever need to replace it. You can see this article for another opinion on the matter.