The original cable length is 5 m.
Be very carefull when you disasamble the speaker. You need to remove one of the small speakers and of coarse the speaker cover. Removing the speaker cover is the most difficult part. I use a needle thin strong tool and when touching the housing of the speaker, I place a piece of 'flat' metal to avoid any marks of the tool. Sometimes it can be nessesary to use some force to remove the cover.
Be carefull when you remove the speaker, the are not availible amymore and are easy damaged. When one speaker is removed, you can see a lot of wires and a filter capacitor, You will also see a 'junction' of cables. The cable from the 'outside' goes to the capacitor and to this junction.
The cable you found on the e-bay is not sutible, you need a much thinner cable. If you disassamble one speaker you will see a part of the original cable and you can then find exactly the same in a shop. You need this dimension of vable or else you cannot get it into the foot-tube of the speaker stand. The plug type og the e-bay cable you found is correct.
I do wirh you good luck.
/Frede
Beolab 5000 - "If another amplifier sounds different then it needs repair!"