Yes, it's a PowerLeap adapter and warranty is useless anyway as I bought it from overseasol' man said:
I would use anything sharp but be careful. Knife tip, small drill bit.
Are you doing this on a Powerleap adapter?
Forget your warranty after this!
Am I supposed to drill the hole all the way to bottom or just top bit? It looks the hole has a neck, above diameter is small and can barely fit the pin only.