Hello I was trying the contract "Fallen Titans" and I noticed that the Sequoia winch points has a conflict with the pickup marker(the up arrow inside the green diamond) .
The pickup marker are to close to the winch point and don't let you attach the crane, to be able to attach the crane you must move the camera trying to find the angle were the pickup marker and the winch point are farest posible and try a few clicks until the crane attaches.
I was playing with keyboard and mouse, I don't know if with a controller you will have this issue too.
I tryed this in proving ground too and without the pickup marker the crane didn't have any issues attaching the sequoia.
Greetings and keep it improving the game.