A challenge when printing smaller objects is that resin shrinks when it cures. You can happily print something with a hole for a wire or pin and then find out that the hole is too small. Oops. It shrank. To help with this I created this chart which can be used to help make a hole large enough to account for the shrinkage. This is really quite vague .. I did some tests using wire and pins to see what would fit in what hole. Honestly .. looks like if you make the hole 125% of the wire you want to pass through it should be close enough that worse case a drill-bit will ream to the needed size without damaging the resin.
holes-and-wire