Cant get drum back on how do I adjust the brake pads

there is an adjustment rod that adjusts the brake shoes out as they wear. so your parking break will work. When you install new pads, they are larger diameter than the old pads you removed, so you need to turn the adjustment rod all the way back in untill the brake drums only drag slightly. It is a good idea to clean and lubricate this adjustment rod assembly when you do a brake job.

chock front wheels so car cant move jack up rear of car see if you can turn the wheel easley remoave tire .look onout side of drum on stud for hokding clips ,you can take them off with a screwdriver or just pry them off or turn them off back off adjuster tap lightely on drum and it should come off

Yes, when you replaced pads on the rear brakes you need to readjust the rear brakes. This is usually very simple to do. Find a safe area to back up about 50 ft. You want to start the vehicle backing up then hit the brakes hard to activate the automatic adjusters until the E brake works. Do this about 3 times then try the Emergency brake and see if it holds. If it doesn't repeat the process. The ABS warning probably came on because a rear caliper extended too far so check those and make sure the boots on the ends of the calipers did not come off. If they did, collapse the caliper and replace the boot. In some cases with older vehicles you can actually adjust this manually with a flat screwdriver from the back side of the drum. To do that you want to adjust it until the rear pads make full contact with the drums then back it off 3 to 5 clicks. so the pads clear the drum in normal operation but are close enough to work when you apply the brakes.

Loosen the rear emergency brake cable. This will alow you more travel to compress the pads onto the rotor.

you need to retract the star adjuster to compensate for the thicker shoes and fatter drum

once on, then you have to expand the star adjust to create a slight drag

you know you've done it correctly when the parking brake feels normal and holds the vehicle on a slight hill

sand brake pads down a little bit

turn the adjuster to loosen the pads to fit the drum back on then from behind use small screwdriver to retighten but not to much

Bolts?
Outer drum goes over the studs (your bolts)
You have to loosen something else.
Bit more difficult. On my old Mazda this was loosening the bearing.
Beware of contamination and re-adjusting bearing play and right amount of torque to be applied. Once you get there replace the shoes if far gone brush all out, etc. and apply some grease to let pads travel. Bet is still the same. As first timer at least buy a manual with drawings or pics.

You need to retract the brake shoes, via the center adjuster mechanism. As your old brake wore, the adjuster moved the shoes outward. Simply move the adjuster to retract the shoes, then slide the drum on. Then, readjust the rear shoes.

On drum brakes there is a pad adjustment wheel, use it to back the pads off far enough from the drum that the edge of the drum clears the pads