How to disassemble Cowin E7 headphone band to replace foam/leather?

Hi,

I bought a pair of second hand Cowin E7 headphones where the leather on the band (and ear pads) was in need of replacing.

I bought replacement parts and removed the damaged band, but the new leather comes in a tube designed (I presume) to slip over the band, which means I need to find a way of detaching one ear piece (inc the wiring) from the band.

Is this possible?

If not I will have to make do with gaffer tape wrapped round.

This was the part I bought

https://www.ebay.co.uk/itm/Headband-Pad-...