In my opinion, no. Ten gallon tanks do not allow the necessary depth needed by a rat. Also, even with a topper it still has inadequate ventilation. I would just start all over and get a good cage.
Try measuring the whole thing and putting the measurements in a rat cage calculator. I remember a ten gallon not being large enough for even one rat, so I would guess that whole thing is technically just large enough for one. I wouldn't even put just a lone rat in there though because of the lack of depth. Rats need lots of room to run around and stretch out
And that wheel is way too small for that rat too So are those tunnels really.
Lack of ventilation (a tank is a tank is a tank... doesn't matter if there's a mesh top or a topper, the ventilation is still awful *in the tank*, whats on top does not change anything)
Leave of *depth* (which is the problem with most tanks... No matter how *long* they are, they will NEVER be *deep* enough). Adults rats, especially males are about as long as a tank is deep... They can barely turn around.
I also agree with the wheel and tubes being way too small. Rats will quickly outgrow hamster tubes (even Syrian hamsters can get too big) and they might get stuck!