Hi Severin, Thanks for your question.
Both these antennas, as with all of our cellular antennas, work best on the short edge of the PCB. On this PCB I'd recommend SR4I010 on the 110mm edge and SR4C033 on the 150mm edge, in the corners, at 90 degrees to each other. However, if you have the option to reduce the PCB to say 150x50mm then they should be placed on the opposite short edges. We offer a free design review service which your regional Sales Representative can engage you with for a more tailored response; please contact firstname.lastname@example.org to get in touch.