Maybe guessing from OP handle he/she is visually impaired and needs the capitals on to see what has been typed. The OP is just looking for help and not yelling.
I would never attempt this " lock?" I saw it at work and thought it was let's say ,interesting. I tried Google but hard to find something without a name. Guess it is not a common process.
Sorry no pictures,not allowed at work but imagine the end of a bolt with a nut threaded on to it flush to the bolt end. Now a small set screw inserted into the threads between nut and bolt parallel to bolt effectively locking nut in place. What is this technique called?
Crude drawing. Messy...
Saw this in social media feed. Maybe he has a picture of interest to you. They maybe car models but the setups give some realistic results.
No affiliation.
https://anthonyryanschmidt.com/
I have had good luck with running a long hose from core into a bucket of water and using wet vacuum on other hose gently sucking ( not air tight connection) it up and repeating in other direction.
Copied from a sellers website:
The hydraulic system of the SPRINTER works with two cylinders on independent hydraulic systems. A special safety device in the hydraulic circuit substitutes the conventional security latches and protects the lift from sagging. Mechanical synchronization is achieved...