An electrical connection apparatus includes at least one stackable block operably coupleable to another stackable block, at least one pin receiving portion defined by an inner wall within the stackable block, and at least one electrical connection contact having a C-shaped contact portion with elastic properties disposed within the pin receiving portion and a lead portion disposed at a location exterior to the stackable block. The electrical connection apparatus may further include an adjustment component and an adjustment component receiving portion defined by in inner wall within the stackable block. In addition, sliders may be arranged on the stackable block and may engage with tabs formed on the at least one electrical connection contact. The sliders may be moved to a raised or lowered position in order to move the at least one electrical connection contact between a contact and an insertion position.