If the radial expansion is relatively smaller(<<< vertical), then in present 45deg configuration, I believe the 2-Gimbal EJ arrangement can absorb radial expansion from the equipment, although somewhat less effective than had the horizontal spool oriented 90deg to nozzle axis. Are Caesar-II results any different?

200mm of lateral movement would result in ~1.64 Deg of rotation for each bellow (with 7m pipe spool in between) and should not be an issue to EJ vendor. Please show restraints local to EJ in the datasheet (a small sketch for better understanding), so that the EJ vendor can review the adequacy of supports.

And yes, those external piping loads (over and above the pressure thrust loads) should be sent to EJ vendor for proper design of external hardware.