class CConstraintTarget
{
    uint8 pad_0000[32];
public:
    Quaternion m_qOffset;
    Vector m_vOffset;
    uint32 m_nBoneHash;
    CUtlString m_sName;
    float32 m_flWeight;
private:
    uint8 pad_004C[13];
public:
    bool m_bIsAttachment;
};

KV3 Class Defaults

{
    m_qOffset = [ 0.0, 0.0, 0.0, 1.0 ]
    m_vOffset = [ 0.0, 0.0, 0.0 ]
    m_nBoneHash = 0
    m_sName = ""
    m_flWeight = 0.0
    m_bIsAttachment = false
}