Looking at the top of the headlight unit with the bonnet open, you’ll see two short, shiny metal rods on the back of the black plastic case. They have a small 5mm?) hex head on the end. On each light, those nearest the radiator provide the up and down adjustment, and those nearest the wings adjust the left/right direction.
To position correctly, drive the car on a flat, level surface towards a wall and get as close as possible to it. On the wall, mark the centre point of the Fiat badge and the centre points of the headlight as a cross (marking the horizontal and vertical centre). Reverse back 4 metres dead straight. The dip beam is ‘banana’ shaped, with a flat portion and an uptick to the left. Adjust the height so that the horizontal part is 3-5cm lower than it was when the car was against the wall. Adjust left right so the uptick is left of the headlight centre marks - if it touches the vertical centre line or is to the right of it that’s an MOT fail. The horizontal part of the beam can also fail an MOT if too high or too low, but the margin for error is quite big.
And yes, Osram Nightbreaker or similar 130% brighter bulbs make a big difference too.
Mine, when delivered had the height set correctly but the left light pointed right and the right pointed left, so the beams converged at a narrow point. Setting left/right correct made a big difference, more noticeable on main beam.
The diagram here shows what you’re looking for, but note on a RHD car the beam pattern will be reversed with the uptick to the left. https://headlightsize.com/how-to-adjust-headlights-properly-aiming-wall-chart/
This page describes for a motorbike but the same applies to a car too... http://ridershandbook.com/bikes-and-equipment/how-to-align-your-motorcycle-headlight-for-mot/
Note: do all this with the dash control set to zero (the highest setting), and the boot empty. Also, do check the bulbs are correctly fitted into their holders.