were should i put the ports on my box?

i have built a box for my 2 12" sony xplods the demension are (H)19 (W)28 (D)12.5  thickness of wood 3/4 & i am putting a divider in the middel of the box to seperate the subs into there own chamber were should i put the ports which are "3 by 8" were is the best spot to put them so i can get the best sound out of them  please get back to me ok thanks

Ports should be on the speaker baffle (the same side where the speakers are mounted.) 

As shadowrelic stated above, you need to make sure your enclosure is the correct size for your speakers.  With the dimensions you list, the total interior volume of your enclosure is about 2.9 CUFT before taking into accound driver, bracing and divider volume.  So estimating that and cutting the total volume in half gives you at most 1.3 CUFT per driver.  This sounds OK for a generic 12" sub sealed enclosure, but entirely too small for a ported one.  What is the model of your subs?

they are sony xplod  2 12" 1200watts max 350watts rms the sheet i got with the subs calls for 1.58cu ft for ported from my mesurments i put them in the program on here to give you the cu.ft of the box & i get 1.58 cu.ft & i have a divider in the middle to seperate each sub so according to that program my box is the right size  so do i have to put the ports of the front beside each sub or can i put them a the back of the box ??? what will give me the best bass or does it matter?? please get back to me i am building it right now as we speak ok thanks again

my mesurments again are width 28 but i put in 14 cause 14 +14 =28

hight 19"

Depth 14"

=1.58239

& the ports are 3X8

were is the best location for my ports

In most cases the ports should be on the same side as the subs (the baffle board) as Dyohn pointed out, this is to reinforce the output of the driver. In some cases a port works really well if it is pointed into a corner as well. I prefer my ports on the baffle board.

so it would not be a good idea to put the ports of the top of the box near the back of the box then

 it was just if i lay it down in my trunk the 1 way its not as high  i have not cut out the sub holes yet but then i dont have any room to put the ports beside the subs if i do it this way

& if i put the ports on the front beside the sub how close should they be to the sub then?