Hello and good morning swreeder,
I want to welcome you as the newest resident member of the "Flail Mower Nations" from Wimberly Texas.
Are your rear tires loaded with liquid
ballast??
A couple of things you need to look at and adjust are (1) your three point hitches lower links MUST be level to reduce any stress on the lower lift arm links and (2) you need to invest in 2 two way needle valves and long hydraulic fittings to control the speed of the oil flow to the boom swing cylinder and the mower lift/lower cylinder.
If you have three draft control valves in the cabin you need to make sure they are all fully lowered to make sure the three point hitch is level from side to side to let it float.
I am glad to see the hose protection sleeves on those hoses.
As the hoses have banjo hydraulic fittings on the cylinders the best way to do this is install the 2 way needle valves on the quick attach fitting hoses ends as you would have to replace the entire hose if they were attached to the cylinder end of each hose.
I would strongly suggest that you go to a hydraulic repair shop to buy the 2 way needle valves and the steel hose fittings for the 2 flail mower hoses you will attach them to as they will know exactly what you need as long as you bring pictures of the hose ends and the numbers on the hose fittings that are attached to the quick connect fittings.
You will need a pair of extension fittings to let you connect the quick connect fittings to the manifold on the tractor and they can order them for you.
By installing the short and long steel hose extension fittings you will have no trouble installing and removing the quick couplers in the manifolds as they will not interfere with each other as one mounting assembly will be longer than the other and it will prevent filling the swear jar and skinned knuckles.
You need to also take pictures of the information printed on the hoses or write the information down so you can give it to the hydraulic repair shop to order the correct fittings for you.
If there is no printing on the hoses you can take both of the quick connect fittings with you to the hydraulic repair shop to order the right fittings.
By slowing the oil flow of the double acting cylinder to one port on each cylinder that will control the boom swing speed and elevation to vertical speed you need reduce the stress on the mower frame and reduce the chance to cause a tip over event.
LeonZ