Secret key signature packet

What is the content of the secret key signature packet? I know that open
pgp doesn`t support secret key signing so hash left 2 bytes, DSA r and DSA
s are not included in the signature packet. I assume that the content is:

-Version number (1 octet)
-Signature type (1 octet)
-Public key algorithm (1 octet)
-Hash algorithm (1 octet)
-Hashed subpackets (n octets)
-Sub packet (issuer key id 8 octets)

Is this right?