Could be worth looking for however the injectors are isolated for gas, often a relay added under drivers seat.

Have a good poke where the inner wing meets the bulkhead, under/behind the washer bottle, if it's concealed bonnet hinges, look under them also.

The square hole in your second pic is where your switch should be, it's probably dangling by it's cable somewhere under your dash, if you have abs then it's 4 wires, fiddly bugger to put in, pull out the red sleeve a little first, push in after so it locks, kinda, in place.