This is my take on a ZK-5KX power supply box. It has the following features

1. Mounts a ZK-5KX or ZK-4KX
2. Can be powered from a dewalt battery or XT60 (on the rear)
3. Power button
4. Power output is via 4mm banana plugs of the XT60 (on the front)

Parts you will need:

1. 1 x ZK-5KX or ZK-4KX module (I suggest the ZK-5KX as it has a built in fan)
2. 1 x XT60EW-M
3. 1x XT60E
4. 1x red banana plug such as https://www.amazon.co.uk/dp/B098T5T4ZR
5. 1x red banana plug
6. 1x rocker switch such as https://www.amazon.co.uk/dp/B08CY41YT5
7. 4x M3 Knurled inserts such as https://www.amazon.co.uk/dp/B09PBJHMND
8. 1x M3 countersunk 8mm screw
9. 3x M3 button head 8mm screws
10. 2x M3 button head 12mm screws
11. 4x M2.5 8mm screws (for the XT60's)
12. Some wire, solder & heatshrink