Hooking up Seimitsu Seimitsu PSL-30N-5 w2 to PS360+

Hi everybody

I have purchased a Sega Naomi and want to make a mamecab from it.

So I've got PS360+ pcb for the controls and got some Seimitsu PSL-30N-5 w2 illuminated buttons .

But i just cant figure it out to how do i have to link the buttons to the ps360 in order to function .

Do i can get the 5 v required for the LEDS from the ps360 or do i have to get them from the Naomi .? And where in the Naomi cant i get the 5v required ?

Thanks in advance

Best regards