Ok. Oh. Problem is that in MTA you couldn't add 0.3c objects so only textures are replaced. So you can get co-ordinates in MTA but before adding it into sa-mp replace IDs with these ones:
https://sampwiki.blast.hk/wiki/Samp_objects
Remember or write on paper like if you place police light it will appear girders11. Then you go on page I gave you, find police light, get his ID and replace it with all objects that have girders11 in comment (
http://convertffs.com gives name of the objects in comment). Reply if you didn't understand.