Remote wire links amp with player, meaning amp will turn on/off with player. It is recommended to connect remote wire.
Without remote wire, amp will turn on with switch, even when player is off.
Updated @salmankhan_627
Post 2441 by ekdrifter. In photo 7, between red and blue wires, there is thin remote wire.
It connects to player. Remote wire tag should be with the player grip wires, as shown by ekdrifter in photo 4.