Find a 12v light bulb and use that to charge your cap. Connect the neg to the neg on cap, connect one end of 12v light bulb to the battery, the other to the cap's pos. Now wait few seconds and the light will go out. The cap should be fully charged.
haha dont be a d1ck head jus cuz you dont like them. jus connect it to the battery charger, but realli tho a cap really isnt worth it cuz thats jus another thing for you alt to keep charged het a HO alt or kinetik oddessy of even yellow top battery but im not gonna be a d1ck head and tell you lik issac no offense isaac