What is left and right cuff?

Does anybody know the principle to name cuffs as left cuff or right cuff? The recommended position behind the back keyhole up and ratchet inside defines left and right?

hands behind back, keyhole facing elbows, bows towards body.
doesn't work for Berliners, H&R super, saflok

Does anybody know the principle to name cuffs as left cuff or right cuff? The recommended position behind the back keyhole up and ratchet inside defines left and right?

Facing both keyholes, bows at the top. left side is the left cuff and right side is the right cuff. It's the way it was explained to me, if I am wrong I am sure someone will correct me.

Does anybody know the principle to name cuffs as left cuff or right cuff? The recommended position behind the back keyhole up and ratchet inside defines left and right?

correct

Does anybody know the principle to name cuffs as left cuff or right cuff? The recommended position behind the back keyhole up and ratchet inside defines left and right?

Thank you! Therefore cuffs with keyhole on both sides like Ralkem or ASP can't be separated to left and right?

Does anybody know the principle to name cuffs as left cuff or right cuff? The recommended position behind the back keyhole up and ratchet inside defines left and right?

The "standard" has always been (as per Dick Norman's "Handcuff Notebook" booklet - which actually were a compilation of late 1950's articles that he wrote for the "Locksmith Ledger"):


For handcuffing IN FRONT:


LEFT Cuff: Bow DOWN, keyhole faces the prisoner (away from fingers).

RIGHT Cuff: Bow DOWN, keyhole faces the prisoner (away from fingers).