WPX16-NL4MP - 16 Port 4 Pole Speakon Wall Plate

Rear terminals are 3/16" male spade connectors for soldering.
As an alternative to soldering you could use crimp female disconnects, found HERE

Plate Specs & Info
Height x Width4.00" x 16.75"
Mounting Info?Mounting info found Here
Old Stock Number?WP4SPK16

WPX16-NL4MP Front View

Front

WPX16-NL4MP Rear View

Rear