If you’d like to set just one wallet address to receive payouts for all (or some) of your mining accounts, log into your PEGA-Pool account and then click on the Account Settings link on the top-right side of the website (click on your account name to open the dropdown). 

From there, click on the Edit & Setup Payout link to be taken to the next page. Once there, scroll down to the Payout Address area. Within that area, click on the dropdown bar just under the words: SYNC BTC PAYOUT ADDRESS WITH MINING ACCOUNTS (where it says Mining Accounts).

Place a checkmark next to either All Accounts, or go down the list placing a checkmark next to all of the mining accounts that you wish to have the profits from delivered to the same wallet address.

When done, click Save.