I couldn't find William and Penda in 1870. I did find Scipio's family.

1870 Census St Andrew's Parish, Charleston Co., SC
Jacob Moultrie 25 M B School Teacher b. SC
Hagar Moultrie 22 F B Keeping House b. SC
Nellie Moultrie 2 F B At Home b. SC
Frank Moultrie 3mon M B b. SC born April
William Ditts? 21 M B Field Labor b. SC

a few doors away:

Scipio Managault 48 M B Farmer b. SC
Lidaer Managault 35 F B Keeping House b. SC
Sarah Managault 18 F B At Home b. SC
John Managault 14 M B At Home b. SC
William Managault 12 M B At Home b. SC
George Managault 15 M B At Home b. SC