The Last Will: Player Order Board determines the player order for the placement of Planning Markers – which in turn determines the order for Errand Boy placement as usual.
At the start of the game, place a marker of each player's color on a random circle, using only those circles which correspond to the number of players. For the first round, the player order is 5,4,3,2,1; in all other rounds the order is 1,2,3,4,5. If you place an Errand Boy in the left gray circle (with a clock illustration), then your marker is placed on 1 and the other markers shifted right to fill the gap you left. Similarly, if you place your Errand Boy on the right circle, your marker is placed on 2 and other markers shifted right to fill any gap you left.
For more information, visit the BGG listing.