Mount the PSU with 5x M3x6 button head screws. The output voltage terminals will be facing up.

Mount the Duet by first screwing in 4 M3x6 button head screws on the inside of the printer through the back panel, into 4x M3x15mm standoffs. Mount the Duet with 4x M3x6 button head screws to the standoffs. The WiFi antenna will be facing up.

Mount the SSR with 2x M4x10 button head screws and 2x M4 nuts. The SSR will be upside down.(Terminals 3 and 4 will be facing up)

There wasn't really a good place to put the Wago connector for the LEDs. I used some 2 sided tape and taped it to the side of the PSU