A computer cart has removable electrical connector management system which may be removed from the computer cart to install portable electronic device electrical transformers, and then reinserted into the computer cart to enable multiple electrical transformers to be installed into the cart as a group. The surgical instrument may be operated compensating for the effect of splay in flexible knife bands on transection length of a powered surgical instrument. User may operate the video game system for the stand-alone computer through the mapping tool. The device suggests the selected connection pair to the application.