IM getting this gauge...

http://cgi.ebay.com/ebaymotors/2-1-16-TINTED-7-COLOR-ELECTRICAL-OIL-PRESSURE-GAUGE_W0QQcmdZViewItemQQcategoryZ43952QQitemZ8045965249



but now, i just need to know how to install it, i searched but couldnt find a way,

could i use the oil sending unit?