Apparatus, systems and methods for forming a connector assembly that includes hoops and hooks designed to engage each other are disclosed. According to one aspect, a connector assembly includes a first substrate and a second substrate. The first substrate includes a plurality of hooks arranged in a hook area. The hooks include at least one hook that is arranged to form an electrical contact. The second substrate includes a plurality of hoops arranged in a hoop area. The hoops include at least one hoop that is arranged to form the electrical contact. The hook interfaces with the hoop to form the electrical contact.