My Magic Trackpad 2 looks different to the one iFixit?

HI folks, I'm attempting to replace the (discarded, swollen) battery of my Magic Trackpad 2, but (a) internally it doesn't look the same as the one here and (b) I can't figure out where the battery was attached before I safely discarded it.

(This was a magic trackpad 2 I was given for work, the battery of which swole during the pandemic, and which I offered to dispose of safely myself. I did this for the battery, but kept the rest of the electronics with the hope of replacing the battery!)

I've attached three photos of the model I have in front of me; isn't arranged like the internals of the one currently on iFixit!

My questions:

• Does anyone have a model that looks like mine?
• Does anyone have tips on how to attach a new battery? (I have an A1542, meant for a Magic Trackpad 2 that looks like the one on iFixit, so it may not work, but nonetheless!)
• Would anyone else be interested in seeing the different internals of this same-model-numbered device?
• Is it possible this is a knockoff? Or a corporate-only version??

The inside of the top/glass — basically only the glass and the touchpad electronics controller.

The inside of the bottom/batter/charging/haptics/lightning port

The model number (A1535) and serial number (that doesn't seem valid with Apple?)

(If these images are too low quality, I'm sure I can post them somewhere else)