your pictures never showed up if you posted any?
so maybe try again


as for set up, most l;adder stands, strap to tree at TOP of ladderr, some also strap to tree where your feet are , when at top of ladder and then about HALF way up the ladder there is normally a BAR that is adjustable to control the distance from the ladder to the tree, about 5-6 ft off the ground, and you mount one end to ladder and other to tree, , this also helps make the ladder stronger and from BOWING when your up top, if you follow
also, you shoudl be able to find a TON of video's on Youtube on how ladderstands get set up, most all are CLOSE to teh same set up, just look for one's like your, which will be the very BASIC bare bones one's
as of age of yours, they came a long way in some materials and designs, but they set up pretty darn much the same way

its NORMALLY easier to set them up with two people and a LOT safer as well!
I would suggest practicing setting it up a few times at home with help before trying it alone in the woods!

and again, keep note of weights, a lot of them older stands had like a 200 lb MAX or less rating!, that means YOU all your gear and such

and don't forget that ladder stands are NOT made to be set up and forgot about, tree's GROW and add a crazy amount of stress to straps as they grow, as does UV , which breaks down the materuials in the straps and can cause them to fail
MOST makers suggest removing them ever few weeks, and re doing things,
NOT many follow this rule/suggestion
I tend to replace straps every yr, and even add a few extra's than just what comes with the stand!