How to connect wires in the Lumen light PCB board slot

Drilling short slot for printed circuit board pcb slot Top Slot PCB Mount Trimmer Resistors pcb slot Name: blind slot printed circuit board Part No E0214040002A Layer count: 10 Material: FR4 ,TG180, , 1 OZ for all layer Minimum tack: 5mil

master slot 777 Synchronics Provides Expert Electronic Repairs For BACHMANN ELECTRONIC ,7 Slot Back Plan PCB 00009207-00 Slot Back Plan PCB 00009634-00