Hi Bonzo,
"I already bypassed fuse #21, does 22 tie into there? I don't understand how the
fuses work with no supply side"
--> Fuses #21 and #22 share same supply within the board (same situation with fuses #14 #15 #16).
See diagram below (red box). Refer to the column "Supplied by":

"Anyways when bypassing, not sure which lines to splice together"
--> Splice the wire on the supply side and any one wire on the load side. The load side will share the connection at board level if there is more than one load connected. Let the load side wires stay connected on the board.
Regards,
Amarin.
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