Best way.

You would have been well over the plated weight XC70

The 240's do not have a plated towing weight so if you were lucky enough to have a 240 you could have towed it with that.

When towing the most important thing is correct nose weight and with 4 wheel trailers having correct tow ball height

^^^^^ this, although it’s probably second place to balancing the centre of gravity of the trailer - but if you get that right you probably get this right too, unless the tow ball on you car is at a height which doesn’t suit the trailer in which case you have a challenge.

Twin axle trailers can behave very differently than single axle setups with the same load....

Yeah. .. now time to service it before its back on the road