Using external SD card with MKRZero instead of on board card

Hi all,

Im trying to read the SD card on a VS1053 mp3 board from adafruit using a MKRZero. Problem is the MKRZero has two SPI buses. The on board SD card is on bus 2 and when i try to use the SD library on the MKRZero, I'm assuming its set to read off bus 2. What i need to do is use SPI bus 1 for SD instead. Essentially forget the SD card reader on SPI 2 and only read the SD card on SPI 1.

Can someone please point me in the right direction to make this happen