JP1 and SW1 on 4-slot, what's their purpose?

Just wondering if anyone knows what these are for. I have searched extensively online but have not even found a reference to the existence of them. Pictures are clickable for a better view. Comments are appreciated.

Top board with JP1 location


JP1 on top board


Bottom board with JP1 and SW1 locations


JP1 on bottom board


SW1

SW1 is simply a reset switch.

JP1 is a power jumper to get extra power from the bottom to the top board. It was used on some of the early 4 slot boards and later just left off.

Would it be worth reconnecting at all?

Thanks channelmaniac for your response. I will order one of these, drop it in and have myself a reset button on my (to be consolised) 4-slot. Took me a while to find a button with the exact same through hole spacing.