Question about 'over'

[HaraKiriBlade]

Sewn into the bandages over the insides of both elbows were zippered lips through which he was fed clear fluid from a clear jar.

I don't think I get the clear picture of the scene described in the sentence. It's the word 'over' that throws me off. I don't know whether the zippered lips is on the bandages, on the elbows or inside the elbows(this wouldn't make sense).

Help on this would be very much appreciated.

[Casiopea]

Does this help?

Zippered lips were sewn into the bandages [which were] over the insides of both elbows.

[HaraKiriBlade]

Thanks Casiopea. Your response gave me a better idea of what to ask.
It probably wasn't 'over' that threw me off, but rather the word next to it, 'inside'.
When the text says 'inside of both elbows', where exactly is it, where the joints and muscles are? like, really anatomical 'inside', through the skin? Or is it 'inside' in reference (comparison?) to the bandages that wraps it around?
Once I get this question clarified I know whether the zippered lips open the entrance through his skin or through the bandages.

[Tdol]

By the insides, I'd take it as the sides of the arm towards to the body- the inner arms. The bandages would go right round the arms, but the food holes would be on the inside (to get the veins, I assume)