12v Trigger Relay Outlet

Obligatory warning: Wiring involves main electricity. Do not wire while live. Do not attempt build unless you know what you are doing.

I use a vintage amp that does not have a 12v trigger line. It also lacks a remote and I'm lazy. This uses a 12v trigger relay from my receiver to switch power. Power in through an IEC cable and out through a 3 prong outlet.

BOM:
12v relay: https://www.mouser.com/ProductDetail/655-T9AP1D52-12
Panel mount IEC: https://www.parts-express.com/parts-express-iec-ac-power-jack-chassis-mount--090-442
Panel mount 3 prong: https://www.mouser.com/ProductDetail/562-738W-X2-01
Heatsink: https://www.mouser.com/ProductDetail/567-642-35AB
3.5mm panel mount jack (mono or stereo)
8 x 3mm screws
2 x 3mm nuts
14-16 & 18 awg wire
4 female .25 terminals

Build:
1. Put all the pieces together without screws. This will help ensure the wiring goes where it is needed. I'm not sure if the relay needs a heat sink but I had one laying around. I attached it to