Susan B. Anthony was a fierceful advocate of women voting rights. To understand her cause it is important to know that she devoted about 50 years of her life to have women reach this right for voting. Let's keep in mind that the 19th Amendment of the Constitution only occured in 1920, some 14 years after her death. The 19th Amendment to the Constitution allowed women voting rights.
Setting some context we can review that back in 1872, some 48 years before women could vote, Susan B. Anthony registered to vote in Rochester, New York and was arrested and convicted by the State of New York and was given a fine of $100.
The statement mentioned in the question was made in 1897, this was 23 years before women could vote. When Susan B. Anthony said that "There never will be complete equality until women themselves help make laws and elect lawmakers" she was ahead of her time since women could not even vote back then.
The statement was made 25 years after she was first convicted for having registered and voted "illegally" so this statement supports her struggle to having women's rights for voting validated. Sadly she died in 1906 before the passage of the 19th Amendment to the Constitution so she did not live to see her cause of women's right to vote come to life.