I've recharged auto air conditioning before and have the gauges and hookups but.............. I can't find the low pressure intake valve on the 1998. I found an "intake" valve but it was a different size than the kit that worked on my Voyager and Caddy. I think kthat it it must be the high pressure side?? I assume that all the connectors are the same size for R134A. Where is the intake valve hidden on this SUV? thxs