58.)
Following the same method used to install lights to the purple arrow sign, install
5x Flashing White 15cm Bit Lights
to the blue arrow sign
(steps 53-55). Thread the two left cables through the bottom middle of the plates, then back down before connecting them to the 8-port
Expansion board in previous step (step 56). Turn on your USB Power Bank to test the flashing lights are working OK.