Picture 14 is a power supply that has gold fingers attached to the end. Should I leave them on or trim them off?

Picture 15, Im not sure if it is part of the power supply or if it would be a different grade of board?

Thanks in advance!

14 trim the wires and remove or cut off the aluminium for peripheral

15. You'll need to open them up for best rate but as is cut the fingers and you'll get cbm at a local yard for the supplies. If they pay for electrical regularly you may get transformer rate out of the shells. And send the fingers to boardsort for the best rate.

If you do open them make sure they've been unplugged for weeks... not days. The caps hold a wicked charge for quit some time and ive shorted out boards removing the case before. Knock me on my arse. And can do worse.