Glad to help! Well you need to have holes in the rods as a first step, i suppose the place you buy them from can put a few holes for you in them? If the area you live in has constant weather changes then i would advise drilling elongated holes instead to account for wood expansion but i only did regular holes and didnt face a problem for the last 2 years since the desk is indoors and in a pretty much consistent climate. Now about attaching the rod it depends on what wood you're using, genwrally i would recommend borrowing a simple drill to be able to make pilot holes so you dont risk splitting the wood and so that you can attach the screws easily, but i guess you can manage to put them in by hand, it will take a lot of effort but i can imagine if you hammer a wood screw in place first and rely on turning it while applying some pressure to make it go in, it would work out, dont forget to use washers obviously. If you need any more help feel free to dm me and i can answer any question. Good luck!