I do not know. I have suspected that Bester's Kop was the Dutch name for End Hill, since the latter is only a mile or two south of Bester's Farm, so Stalker's reference to End Hill and Goetzsche's to Bester's Kop were one and the same. I think that Meurig with his expert knowledge on Boer War place names will have the answer to your question and my speculation.
Unless somewhere there is a listing of those present in "C" squadron of the ILH on - say 2/3 November, 1899 - then the only way to identify members of that unit is by the casualty list. Unless someone comes up with another list - then we will never know those who did and those who DID NOT.