Unless you want to leave the playpen up all the time, I would recommend the cableties that you can see pictured on the link ScottandDebbie posted. They will let you connect the grids, but you can still fold the playpen down after floortime. You might be able to find something like that in home supply stores or hardware stores. I'm sorry I don't know what sort of shops are available to you.
As far as your posting skills go, I think you did quite a good job. As you live in Singapore, I'm guessing that English isn't your first language.
Instances like this are EXACTLY why there are rules, mostly for people who do speak English as their first language, to use proper spelling and grammar. It makes things much easier for everyone to understand.