Inserted an attachment to Part A and Part B then Inserted this script
local m = Instance.new ("RopeConstraint")
m.Parent = game.Workspace
m.Attachment0 = workspace.A.Attachment
m.Attachment1 = workspace.B.Attachment
PGSPhysicsSolverEnabled is true
Nothing happens

2 comments
Constraints are not out yet, roblox is waiting on apple to approve the update for mobile.
Oh that explains.