Fixing bumpers from Fiat Ulysse is identical to the Peugeot 806, Citroën Evasion, Lancia Zeta.

See:

How to remove front and rear bumper Peugeot 806 (Fiat Ulysse, Citroën Evasion, Lancia Zeta)

How to remove front and rear bumper Peugeot 807 (2 Fiat Ulysse, Lancia Phedra, the Citroën C8)