Brian, you will need to complete section 7B if you're applying on form FLR(M)
FLR(M) at section 7A states:-
FLR(M) at Section 7B states:-If you were granted leave to enter or remain as a partner following an application made before the 9th July 2012 you are not
required to complete section 7A, Proceed to 7B MAINTENANCE.
Chapter 8 of the Immigration Rules are concerned with Family Members (Spouses, Civil Partners, Unmarried and same sex relationships, Children and Dependant relatives)You only need to complete this section if:
(i) You qualify for an exemption from meeting the income threshold element of the financial requirement.
(ii) You were granted leave to enter or remain as a partner under Chapter 8 of the Immigration Rules following an application submitted before 9 July 2012.
Your wife was granted leave to enter UK under Chapter 8 of the Immigration Rules following an application submitted before 9 July 2012.