I know for a fact Tekken 1, 2, 3 and Tag are all 15Khz, Low resolution games that run at 512x240 resolution.
3 and Tag allow you to run interlaced, which is still 15Khz Low Res, and runs at 512x480 resolution.
All Tekken releases are definately JAMMA. The JAMMA harness and Kick harness all look in place. Should just plug straight in (small picture, for forgive me if I am wrong). If your JAMMA harness isn't keyed, make sure you put i on the right way not to damage the tekken board. Pin 1 on harness to Pin 1 on PCB....
From the pic, it only appears you'll have to wire the power supply.
All other wiring looks fine to me.
Tekken tag would not run on this you don't have the tag button (JAMMA button 3).