Offered is an additional descriptor that is used to suggest the slavegirl offering her wrists to be tied. It normally means offered in front, but can be used to indicate different positions by qualifying it. For example, in the first photo, the slavegirl’s hands are above her head, so this might be described as hands above head, wrists offered. Specifying offered implies that she should be positioned so as to invite her wrists being tied together. Hence the wrists are crossed, and held a convenient height above the head to facilitate binding.
Variants: depending where the wrists are there are many variants on this position. To make a slavegirl adopt the second position one would order “Get on your knees, wrists offered, head proud”.
Offered is usually used to indicate wrists, but it can be used to order the slavegirl to prepare any part of her body for bondage. It is then up to the slavegirl to position herself to best effect so as to look maximally alluring whilst permitting her master clear and easy access to the specified body part for bondage.
For example “get in virgin sacrifice, ankles and wrists offered” would indicate to the slavegirl that she should lift her wrists and ankles somewhat compared with the usual virgin sacrifice position, as her Master is about to bind her wrists and ankles together.
Restrained Elegance has a wonderful list with pictures of slave positions. Broken down in a simple to undertstand list.