Replacing A Toolbox Lock Help To Replace A Lock On A Truck Bed Toolbox?

Help to replace a lock on a truck bed toolbox? - replacing a toolbox lock

I bought a box of tools from an indvidual that the key lock missing. I am ready to replace the lock, but you do not know where I find the line. The Toolbox is a contender deflected Shield and I'm not sure what you describe the blocking or the way it. Any help would be very grateful.