ᐅ Slackline Attached to Garage Wall – Structural Issue or Not?

Hello everyone,
I have a garden, but unfortunately no large trees. However, I want to set up my slackline to practice walking again.
I’m considering attaching the line to two garages (both my own).
One is built with masonry (sand-lime brick and facing bricks), the other is a prefabricated garage made of reinforced concrete panels.
A slackline can experience tension forces up to 1.5 tons (worst case).
The attachment itself wouldn't be a problem: drill a hole through the wall, fix a steel plate on the inside, and then run a threaded rod with an eye bolt through the wall.

My concern is that the masonry or concrete panels might not withstand the 1.5-ton load.
The anchor points would be at the corner of each garage, not in the middle of the wall, at a height of about 60 cm (24 inches).
Do you think the entire garage wall will be pushed inward under such a load, or is that load manageable for the wall?

PS: Please don’t suggest hiring a structural engineer... that would be too much hassle just for a slackline.