A card connector that is removably fixable to a main body of a carrier system. For example, an outer flange of the card connector may be removably fixed (e.g., with fasteners, such as bolts) to the main body of the carrier system. A protrusion of the card connector may include a connector configured to electrically couple to the plugin card. The protrusion may extend into an interior of the main body when the card connector is removably fixed to the main body, such that the plugin card is disposed entirely within the main body. The card connector provides for a user to easily remove the card connector from the main body (e.g. by unfastening bolts and sliding the card connector out of the main body) and removably fix a new card connector to the main body. The new card connector may include different internal electronics or external porting than the original card connector.