Hayward EC50 flow deflector repair

Hi all,

I have a Hayward EC50 AC filter and the flow deflector which contains the check valve came loose. It easily slides and seems to lock back into place but I am a little confused as to if this is ok because it appears that this part is also attached with an adhesive of some sort. If so what should I use to reattach it? I also found the replacement part online and was just going to put a new part on so that there is a new working check valve…I am just not sure if I have to use an adhesive or cement to attach it? Any help is greatly appreciated! Picture of the part below