Reassemble P-Trap

What happens here

Attach the cleaned P-trap assembly back to the newly installed pop-up drain's tailpiece and the wall pipe. Hand-tighten all slip nuts first, ensuring proper alignment of the pipes. Once hand-tight, use channel locks to give each nut a quarter to half turn, making them snug but not overtightened, which could strip the plastic threads or crack the pipes.

Goal: Reconnect the cleaned P-trap to the new pop-up drain and the wall pipe, ensuring tight connections.