I'm afraid that for his records it is trip to Kew either by yourself, or someone on your behalf...
If you are still in Brummagen, it's not a bad day out, as long as you leave early enough!
The records are in WO97 for pre 1913 discharges, and are alphabetical by name.
His record will give place of birth on the front and any NOK and dependants on the back page...And if he was married whilst still with the colours, a marriage date and place.