The actual function of the hydraulic ram attached to the  brace will  be reversed; since most rams are designed to  do a job, not have a job done to them, but the method of attaching it will be much the same.

The systen above shows the ram with a short throw , ......while the unit above here has a long throw .
      In both cases, each end is on an axle and is free to rotate to accommodate the rise and fall of the arc. 
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TM
A pair of pistons might be mounted side by side  on either side of each brace , thereby doubling the output while sharing and balancing axles .
ARC
HYDRAULIC RAM PISTON
BRACE
FLUID LINES NOT SHOWN
=  AXLE
ARC
BRACE
SHORT
LONG
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