More help on putting my 4x5 test rig together . . .

Is a Schneider 150mm Xenar 4.5 lens a good buy at $145.00 with lens board and re taining ring. It is missing the cable release terminal; Is this a problem? Easy fix? Also, any thoughts on optics? I want the best "affordable" optics so I get a true sense of my picture taking abilities with a 4x5.

Many thanks in advance for responses!