Explanation

Box 1: sys.dm_tran_locks
sys.dm_tran_locks returns information about currently active lock manager resources in SQL Server 2017.
Each row represents a currently active request to the lock manager for a lock that has been granted or is waiting to be granted.
Box 2: sys.dm_os_waiting_tasks
sys.dm_tran_locks.lock_owner_address is the memory address of the internal data structure that is used to track this request. This column can be joined the with resource_address column in sys.dm_os_waiting_tasks.
References:
https://docs.microsoft.com/en-us/sql/relational-databases/system-dynamic-management-views/sys-dm-tran-locks