Sugar metabolism in preserved/cryopreserved livestock semen
The sugars that you mention are primarily used as a "cryoprotectant" and thus to reduce physical damage to the cells while frozen.  The sugars are not used to provide energy to the sperm as the enzymes will not function in the temperatures and conditions of a frozen environment. The addition of sugars is typically used with other types of cells/tissues in their cryopreservation as well.  The abstract in the link below summarized this.

https://onlinelibrary.wiley.com/doi/pdf/10.1111/raq.12195