That fuse box has an entire array of generic Bosch relay plugs - use them for the headlamps (take the load off the switch) and even full juice for the wiper motor. You can also find a generic Bosch/Hella flasher - that will fit perfectly into one of those slots.
You will be greatly improvising on the design.
I would go ape - and even install a system cut relay - meaning that when I twist the key to START - everything except the starter circuit and ignition coil gets cut off.