Wilford Woodruff mentions instructions from Joseph on how to perform the second anointing.
Wilford Woodruff, Journal, December 18, 1857, The Wilford Woodruff Papers website, accessed August 24, 2023
President Young said Joseph taught him to take the Quorums of the Church in their order begining at the Oldest of Each Quorums & Anoint them Kings & Priest u^n^to God When I got through with that begin at the begining again to administer for the dead. When the Temple is finished & a place duly prepared we should not be confined to any particular Number in sealing and Anointing. the rooms next to the East pulpit or over it will be the place to attend to the 2nd Anointings. Under the pulpit in the west End will be a place to offer Sacrafizes there will be an Altar prepared for that purposes so that when any sacrafices are to be offered they should be offered there [FIGURES]