24V power supply SRS / relais extension box for 3d printer

I made a box to mount on a separate 24V power supply

Until now, my 3d printer has been given 12V to the heat bed, so it takes approx. 20 minutes to heat it up to 100 C (while covering it with some insulation on top).
After that it struggled keeping that temperature.
When i designed and built my printer, everything has found a place in the very compact base of the printer, so there was no space left for an extra power supply.

I left the 24V power supply out of the printer housing and left