the clamp you have put on the fuel rail adapter going to the regulator is going to fly off - I can guarantee that - because I have seen it do it, install a band clamp or oetiker clamp (you will need a clic tool or blunt nail pincers (zamboor) to lock the oetiker type clamp)
Dont risk yourself to a fiery death.
Such clamps and their tools were available in Karachi industrial parts market near sindh madressah but I dont know if you can source from there.
however usually branded items like tomei, bosch aftermarket, mugen catalog FPRs are shipped with push lock hosepipes. they dont require clamping. But the pipes you show are not those items.